- May 10, 2013
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Geert Uytterhoeven authored
arch/xtensa/platforms/iss/simdisk.c: In function 'proc_read_simdisk': arch/xtensa/platforms/iss/simdisk.c:220:12: warning: initialization discards 'const' qualifier from pointer target type [enabled by default] arch/xtensa/platforms/iss/simdisk.c: In function 'proc_write_simdisk': arch/xtensa/platforms/iss/simdisk.c:241:38: error: 'buffer' undeclared (first use in this function) arch/xtensa/platforms/iss/simdisk.c:241:38: note: each undeclared identifier is reported only once for each function it appears in Introduced by commit a69755b1 ("xtensa simdisk: switch to proc_create_data()") Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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- May 08, 2013
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Linus Torvalds authored
I badly screwed up the merge in commit 6fa52ed3 ("Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/.../arm-soc") by incorrectly taking the arch/arm/mach-omap2/* data fully from the merge target because the 'drivers-for-linus' branch seemed to be a proper superset of the duplicate ARM commits. That was bogus: commit ff931c82 ("ARM: OMAP: clocks: Delay clk inits atleast until slab is initialized") only existed in head, and the changes to arch/arm/mach-omap2/timer.c from that commit got list. Re-doing the merge more carefully, I do think this part was the only thing I screwed up. Knock wood. Reported-by:
Tony Lindgren <tony@atomide.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Olof Johansson <olof@lixom.net> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Davidlohr Bueso authored
This patch tries to reduce the amount of cmpxchg calls in the writer failed path by checking the counter value first before issuing the instruction. If ->count is not set to RWSEM_WAITING_BIAS then there is no point wasting a cmpxchg call. Furthermore, Michel states "I suppose it helps due to the case where someone else steals the lock while we're trying to acquire sem->wait_lock." Two very different workloads and machines were used to see how this patch improves throughput: pgbench on a quad-core laptop and aim7 on a large 8 socket box with 80 cores. Some results comparing Michel's fast-path write lock stealing (tps-rwsem) on a quad-core laptop running pgbench: | db_size | clients | tps-rwsem | tps-patch | +---------+----------+----------------+--------------+ | 160 MB | 1 | 6906 | 9153 | + 32.5 | 160 MB | 2 | 15931 | 22487 | + 41.1% | 160 MB | 4 | 33021 | 32503 | | 160 MB | 8 | 34626 | 34695 | | 160 MB | 16 | 33098 | 34003 | | 160 MB | 20 | 31343 | 31440 | | 160 MB | 30 | 28961 | 28987 | | 160 MB | 40 | 26902 | 26970 | | 160 MB | 50 | 25760 | 25810 | ------------------------------------------------------ | 1.6 GB | 1 | 7729 | 7537 | | 1.6 GB | 2 | 19009 | 23508 | + 23.7% | 1.6 GB | 4 | 33185 | 32666 | | 1.6 GB | 8 | 34550 | 34318 | | 1.6 GB | 16 | 33079 | 32689 | | 1.6 GB | 20 | 31494 | 31702 | | 1.6 GB | 30 | 28535 | 28755 | | 1.6 GB | 40 | 27054 | 27017 | | 1.6 GB | 50 | 25591 | 25560 | ------------------------------------------------------ | 7.6 GB | 1 | 6224 | 7469 | + 20.0% | 7.6 GB | 2 | 13611 | 12778 | | 7.6 GB | 4 | 33108 | 32927 | | 7.6 GB | 8 | 34712 | 34878 | | 7.6 GB | 16 | 32895 | 33003 | | 7.6 GB | 20 | 31689 | 31974 | | 7.6 GB | 30 | 29003 | 28806 | | 7.6 GB | 40 | 26683 | 26976 | | 7.6 GB | 50 | 25925 | 25652 | ------------------------------------------------------ For the aim7 worloads, they overall improved on top of Michel's patchset. For full graphs on how the rwsem series plus this patch behaves on a large 8 socket machine against a vanilla kernel: http://stgolabs.net/rwsem-aim7-results.tar.gz Signed-off-by:
Davidlohr Bueso <davidlohr.bueso@hp.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Anatol Pomozov authored
- make warning smp-safe - result of atomic _unless_zero functions should be checked by caller to avoid use-after-free error - trivial whitespace fix. Link: https://lkml.org/lkml/2013/4/12/391 Tested: compile x86, boot machine and run xfstests Signed-off-by:
Anatol Pomozov <anatol.pomozov@gmail.com> [ Removed line-break, changed to use WARN_ON_ONCE() - Linus ] Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull more vfs updates from Al Viro: "A couple of fixes + getting rid of __blkdev_put() return value" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: proc: Use PDE attribute setting accessor functions make blkdev_put() return void block_device_operations->release() should return void mtd_blktrans_ops->release() should return void hfs: SMP race on directory close()
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linuxLinus Torvalds authored
Pull parisc updates from Helge Deller: "Main fixes and updates in this patch series are: - we faced kernel stack corruptions because of multiple delivery of interrupts - added kernel stack overflow checks - added possibility to use dedicated stacks for irq processing - initial support for page sizes > 4k - more information in /proc/interrupts (e.g. TLB flushes and number of IPI calls) - documented how the parisc gateway page works - and of course quite some other smaller cleanups and fixes." * 'parisc-for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: tlb flush counting fix for SMP and UP parisc: more irq statistics in /proc/interrupts parisc: implement irq stacks parisc: add kernel stack overflow check parisc: only re-enable interrupts if we need to schedule or deliver signals when returning to userspace parisc: implement atomic64_dec_if_positive() parisc: use long branch in fork_like macro parisc: fix NATIVE set up in build parisc: document the parisc gateway page parisc: fix partly 16/64k PAGE_SIZE boot parisc: Provide default implementation for dma_{alloc, free}_attrs parisc: fix whitespace errors in arch/parisc/kernel/traps.c parisc: remove the second argument of kmap_atomic
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git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xenLinus Torvalds authored
Pull ARM Xen SMP updates from Stefano Stabellini: "This contains a bunch of Xen/ARM specific changes, including some fixes, SMP support for Xen on ARM, and moving the xenvm machine from mach-vexpress to mach-virt. The non-Xen files that are touched are arch/arm/Kconfig, to select ARM_PSCI on XEN, and arch/arm/boot/dts/Makefile, to build the xenvm DTB if CONFIG_ARCH_VIRT. Highlights: - Move xenvm to mach-virt. - Implement SMP support in Xen on ARM. - Add support for machine reboot and power off via Xen hypercalls" * tag '3.9-rc3-smp-6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen: xen/arm: remove duplicated include from enlighten.c xen/arm: use sched_op hypercalls for machine reboot and power off xenvm: add a simple PSCI node and a second cpu xen/arm: XEN selects ARM_PSCI xen: move the xenvm machine to mach-virt xen/arm: SMP support xen/arm: implement HYPERVISOR_vcpu_op xen/arm: actually pass a non-NULL percpu pointer to request_percpu_irq
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Helge Deller authored
Fix up build error on UP and show correctly number of function call (ipi) irqs. Signed-off-by:
Helge Deller <deller@gmx.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteprocLinus Torvalds authored
Pull remoteproc update from Ohad Ben-Cohen: - Some refactoring, cleanups and small improvements from Sjur Brændeland. The improvements are mainly about better supporting varios virtio properties (such as virtio's config space, status and features). I now see that I messed up while commiting one of Sjur's patches and erroneously put myself as the author, as well as letting a nasty typo sneak in. I will not fix this in order to avoid rebasing the patches. Sjur - sorry! - A new remoteproc driver for OMAP-L13x (technically a DaVinci platform) from Robert Tivy. - Extend OMAP support to OMAP5 as well, from Vincent Stehlé. - Fix Kconfig VIRTUALIZATION dependency, from Suman Anna (a non-critical fix which arrived late during the rc cycle). * tag 'remoteproc-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc: remoteproc: fix kconfig dependencies for VIRTIO remoteproc/davinci: add a remoteproc driver for OMAP-L13x DSP remoteproc: support default firmware name in rproc_alloc() remoteproc/omap: support OMAP5 too remoteproc: set vring addresses in resource table remoteproc: support virtio config space. remoteproc: perserve resource table data remoteproc: calculate max_notifyid by counting vrings remoteproc: code cleanup of resource parsing remoteproc: parse STE-firmware and find resource table address remoteproc: add find_loaded_rsc_table firmware ops remoteproc: refactor rproc_elf_find_rsc_table()
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git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsgLinus Torvalds authored
Pull rpmsg changes from Ohad Ben-Cohen: "A small pull request consisting of: - Make rpmsg process all pending messages instead of just one, from Robert Tivy - Fix Kconfig dependency on VIRTUALIZATION, from Suman. Note: this was submitted late during the 3.9 rc cycle and it seemed appropriate to wait with it for the merge window. - Belated addition of an rpmsg entry to the MAINTAINERS file. People seem to look for this" * tag 'rpmsg-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg: rpmsg: fix kconfig dependencies for VIRTIO MAINTAINERS: add rpmsg entry rpmsg: process _all_ pending messages in rpmsg_recv_done
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git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlockLinus Torvalds authored
Pullhwspinlock update from Ohad Ben-Cohen: "A single patch from Vincent extending OMAP's hwspinlock support to OMAP5" * tag 'hwspinlock-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock: hwspinlock/omap: support OMAP5 as well
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libataLinus Torvalds authored
Pull libata maintainership change from Tejun Heo. Tejun is taking over from Jeff, after many many years. Thanks Jeff. * 'for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: libata: change maintainer
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Helge Deller authored
Add framework and initial values for more fine grained statistics in /proc/interrupts. Signed-off-by:
Helge Deller <deller@gmx.de>
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Helge Deller authored
Default kernel stack size on parisc is 16k. During tests we found that the kernel stack can easily grow beyond 13k, which leaves 3k left for irq processing. This patch adds the possibility to activate an additional stack of 16k per CPU which is being used during irq processing. This implementation does not yet uses this irq stack for the irq bh handler. The assembler code for call_on_stack was heavily cleaned up by John David Anglin. CC: John David Anglin <dave.anglin@bell.net> Signed-off-by:
Helge Deller <deller@gmx.de>
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Helge Deller authored
Add the CONFIG_DEBUG_STACKOVERFLOW config option to enable checks to detect kernel stack overflows. Stack overflows can not be detected reliable since we do not want to introduce too much overhead. Instead, during irq processing in do_cpu_irq_mask() we check kernel stack usage of the interrupted kernel process. Kernel threads can be easily detected by checking the value of space register 7 (sr7) which is zero when running inside the kernel. Since THREAD_SIZE is 16k and PAGE_SIZE is 4k, reduce the alignment of the init thread to the lower value (PAGE_SIZE) in the kernel vmlinux.ld.S linker script. Signed-off-by:
Helge Deller <deller@gmx.de>
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Geert Uytterhoeven authored
arch/arm/mach-msm/last_radio_log.c: In function 'msm_init_last_radio_log': arch/arm/mach-msm/last_radio_log.c:69:7: error: dereferencing pointer to incomplete type arch/cris/kernel/profile.c: In function 'init_cris_profile': arch/cris/kernel/profile.c:79:8: error: dereferencing pointer to incomplete type Use proc_set_size(), cfr. commit 271a15ea ("proc: Supply PDE attribute setting accessor functions") Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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John David Anglin authored
parisc: only re-enable interrupts if we need to schedule or deliver signals when returning to userspace Helge and I have found that we have a kernel stack overflow problem which causes a variety of random failures. Currently, we re-enable interrupts when returning from an external interrupt incase we need to schedule or delivery signals. As a result, a potentially unlimited number of interrupts can occur while we are running on the kernel stack. It is very limited in space (currently, 16k). This change defers enabling interrupts until we have actually decided to schedule or delivery signals. This only occurs when we about to return to userspace. This limits the number of interrupts on the kernel stack to one. In other cases, interrupts remain disabled until the final return from interrupt (rfi). Signed-off-by:
John David Anglin <dave.anglin@bell.net> Signed-off-by:
Helge Deller <deller@gmx.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull late ARM Exynos multiplatform changes from Arnd Bergmann: "These continue the multiplatform support for exynos, adding support for building most of the essential drivers (clocksource, clk, irqchip) when combined with other platforms. As a result, it should become really easy to add full multiplatform exynos support in 3.11, although we don't yet enable it for 3.10. The changes were not included in the earlier multiplatform series in order to avoid clashes with the other Exynos updates. This also includes work from Tomasz Figa to fix the pwm clocksource code on Exynos, which is not strictly required for multiplatform, but related to the other patches in this set and needed as a bug fix for at least one board." * tag 'multiplatform-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (22 commits) ARM: dts: exynops4210: really add universal_c210 dts ARM: d...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC late cleanups from Arnd Bergmann: "These are cleanups and smaller changes that either depend on earlier feature branches or came in late during the development cycle. We normally try to get all cleanups early, so these are the exceptions: - A follow-up on the clocksource reworks, hopefully the last time we need to merge clocksource subsystem changes through arm-soc. A first set of patches was part of the original 3.10 arm-soc cleanup series because of interdependencies with timer drivers now moved out of arch/arm. - Migrating the SPEAr13xx platform away from using auxdata for DMA channel descriptions towards using information in device tree, based on the earlier SPEAr multiplatform series - A few follow-ups on the Atmel SAMA5 support and other changes for Atmel at91 based on the larger at91 reworks. - Moving the armada irqchip implementation to drivers/irqchip - Several OMAP cleanups following up on the larger series already merged in 3.10." * tag 'cleanup-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (50 commits) ARM: OMAP4: change the device names in usb_bind_phy ARM: OMAP2+: Fix mismerge for timer.c between ff931c82 and da4a686a ARM: SPEAr: conditionalize SMP code ARM: arch_timer: Silence debug preempt warnings ARM: OMAP: remove unused variable serial: amba-pl011: fix !CONFIG_DMA_ENGINE case ata: arasan: remove the need for platform_data ARM: at91/sama5d34ek.dts: remove not needed compatibility string ARM: at91: dts: add MCI DMA support ARM: at91: dts: add i2c dma support ARM: at91: dts: set #dma-cells to the correct value ARM: at91: suspend both memory controllers on at91sam9263 irqchip: armada-370-xp: slightly cleanup irq controller driver irqchip: armada-370-xp: move IRQ handler to avoid forward declaration irqchip: move IRQ driver for Armada 370/XP ARM: mvebu: move L2 cache initialization in init_early() devtree: add binding documentation for sp804 ARM: integrator-cp: convert use CLKSRC_OF for timer init ARM: versatile: use OF init for sp804 timer ARM: versatile: add versatile dtbs to dtbs target ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC device tree updates (part 2) from Arnd Bergmann: "These are mostly new device tree bindings for existing drivers, as well as changes to the device tree source files to add support for those devices, and a couple of new boards, most notably Samsung's Exynos5 based Chromebook. The changes depend on earlier platform specific updates and touch the usual platforms: omap, exynos, tegra, mxs, mvebu and davinci." * tag 'dt-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (169 commits) ARM: exynos: dts: cros5250: add EC device ARM: dts: Add sbs-battery for exynos5250-snow ARM: dts: Add i2c-arbitrator bus for exynos5250-snow ARM: dts: add mshc controller node for Exynos4x12 SoCs ARM: dts: Add chip-id controller node on Exynos4/5 SoC ARM: EXYNOS: Create virtual I/O mapping for Chip-ID controller using device tree ARM: davinci: da850-evm: add SPI flash support ARM: davinci: da850: override SPI DT node device name ARM: davinci: da850: add SPI1 DT node spi/davinci: add DT binding documentation spi/davinci: no wildcards in DT compatible property ARM: dts: mvebu: Convert mvebu device tree files to 64 bits ARM: dts: mvebu: introduce internal-regs node ARM: dts: mvebu: Convert all the mvebu files to use the range property ARM: dts: mvebu: move all peripherals inside soc ARM: dts: mvebu: fix cpus section indentation ARM: davinci: da850: add EHRPWM & ECAP DT node ARM/dts: OMAP3: fix pinctrl-single configuration ARM: dts: Add OMAP3430 SDP NOR flash memory binding ARM: dts: Add NOR flash bindings for OMAP2420 H4 ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC platform updates (part 3) from Arnd Bergmann: "This is the third and smallest of the SoC specific updates. Changes include: - SMP support for the Xilinx zynq platform - Smaller imx changes - LPAE support for mvebu - Moving the orion5x, kirkwood, dove and mvebu platforms to a common "mbus" driver for their internal devices. It would be good to get feedback on the location of the "mbus" driver. Since this is used on multiple platforms may potentially get shared with other architectures (powerpc and arm64), it was moved to drivers/bus/. We expect other similar drivers to get moved to the same place in order to avoid creating more top-level directories under drivers/ or cluttering up the messy drivers/misc/ even more." * tag 'soc-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (50 commits) ARM: imx: reset_controller may be disabled ARM: mvebu: Align the internal registers virtual base to support LPAE ARM: mvebu: Limit the DMA zone when LPAE is selected arm: plat-orion: remove addr-map code arm: mach-mv78xx0: convert to use the mvebu-mbus driver arm: mach-orion5x: convert to use mvebu-mbus driver arm: mach-dove: convert to use mvebu-mbus driver arm: mach-kirkwood: convert to use mvebu-mbus driver arm: mach-mvebu: convert to use mvebu-mbus driver ARM i.MX53: set CLK_SET_RATE_PARENT flag on the tve_ext_sel clock ARM i.MX53: tve_di clock is not part of the CCM, but of TVE ARM i.MX53: make tve_ext_sel propagate rate change to PLL ARM i.MX53: Remove unused tve_gate clkdev entry ARM i.MX5: Remove tve_sel clock from i.MX53 clock tree ARM: i.MX5: Add PATA and SRTC clocks ARM: imx: do not bring up unavailable cores ARM: imx: add initial imx6dl support ARM: imx1: mm: add call to mxc_device_init ARM: imx_v4_v5_defconfig: Add CONFIG_GPIO_SYSFS ARM: imx_v6_v7_defconfig: Select CONFIG_PERF_EVENTS ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC platform updates (part 2) from Arnd Bergmann: "These patches are all for Renesas shmobile, and depend on the earlier pinctrl updates. Remarkably, this adds support for three new SoCs: r8a73a4, r8a73a4 and r8a7778. The bulk of the code added for these is for pinctrl (using the new subsystem) and for clocks (not yet using the common clock subsystem). The latter will have to get converted in one of the upcoming releases, but shmobile is not ready for that yet. The series also contains Renesas shmobile board changes, adding one board file for each of the three new SoCs. These boards are using a mix of classic and device-tree based probing, as there is still a lot of infrastructure in shmobile that has not been converted to DT yet. Once those are resolved to the degree that no board specific setup code is needed, they can get folded into the respective SoC setup files." * tag 'soc-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (78 commits) ARM: shmobile: use r8a7790 timer setup code on Lager ARM: shmobile: force enable of r8a7790 arch timer ARM: shmobile: Add second I/O range for r8a7790 PFC ARM: shmobile: bockw: enable network settings on bootargs ARM: shmobile: bockw: add SMSC ethernet support ARM: shmobile: R8A7778: add Ether support ARM: shmobile: bockw: enable SMSC ethernet on defconfig ARM: shmobile: r8a7778: add r8a7778_init_irq_extpin() ARM: shmobile: r8a7778: remove pointless PLATFORM_INFO() ARM: shmobile: mackerel: clean up MMCIF vs. SDHI1 selection ARM: shmobile: mackerel: add interrupt names for SDHI0 ARM: shmobile: mackerel: switch SDHI and MMCIF interfaces to slot-gpio ARM: shmobile: mackerel: remove OCR masks, where regulators are used ARM: shmobile: mackerel: SDHI resources do not have to be numbered ARM: shmobile: Initial r8a7790 Lager board support ARM: shmobile: APE6EVM LAN9220 support ARM: shmobile: APE6EVM PFC support ARM: shmobile: APE6EVM base support ARM: shmobile: kzm9g-reference: add ethernet support ARM: shmobile: add R-Car M1A Bock-W platform support ...
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Tejun Heo authored
Jeff is leaving for something more interesting and I'm inheriting the maintainership of libata. Thanks a lot for the good work and have fun, Jeff! v2: The original path forgot to update git tree URL. Updated. Spotted by Sergei. Signed-off-by:
Tejun Heo <tj@kernel.org> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds authored
Pull more vhost fixes from Michael Tsirkin: "This fixes some minor issues in the patches that have been merged. We also finally drop the workaround disabling event_idx for scsi: it was always questionable, and now we know it's not needed. There's also a memory leak fix" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vhost-scsi: Enable VIRTIO_RING_F_EVENT_IDX vhost: drop virtio_net.h dependency vhost-net: Cleanup vhost_ubuf and vhost_zcopy vhost: Remove vhost_enable_zcopy in vhost.h vhost: Remove comments for hdr in vhost.h vhost: Move VHOST_NET_FEATURES to net.c vhost-net: Free ubuf when vhost_dev_set_owner fails vhost: Export vhost_dev_set_owner
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuseLinus Torvalds authored
Pull fuse updates from Miklos Szeredi: "This contains two patchsets from Maxim Patlasov. The first reworks the request throttling so that only async requests are throttled. Wakeup of waiting async requests is also optimized. The second series adds support for async processing of direct IO which optimizes direct IO and enables the use of the AIO userspace interface." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: add flag to turn on async direct IO fuse: truncate file if async dio failed fuse: optimize short direct reads fuse: enable asynchronous processing direct IO fuse: make fuse_direct_io() aware about AIO fuse: add support of async IO fuse: move fuse_release_user_pages() up fuse: optimize wake_up fuse: implement exclusive wakeup for blocked_waitq fuse: skip blocking on allocations of synchronous requests fuse: add flag fc->initialized fuse: make request allocations for background processing explicit
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpcLinus Torvalds authored
Pull powerpc updates from Benjamin Herrenschmidt: "Here are a few more powerpc bits that I would like in 3.10. Mostly remaining bolts & screw tightening of power8 support such as actually exposing the new features via the previously added AT_HWCAP2, and a few fixes, some of them for problems exposed recently like irqdomain warnings or sysfs access permission issues, some exposed by power8 hardware. The only change outside of arch/powerpc is a small one to irqdomain.c to allow silent failure to fix a problem on Cell where we get a dozen WARN_ON's tripping at boot for what is basically a normal case." * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: Make hard_irq_disable() do the right thing vs. irq tracing powerpc/topology: Fix spurr attribute permission powerpc/pci: Support per-aperture memory offset powerpc/cell/iommu: Improve error message for missing node powerpc/cell/spufs: Fix status attribute permission irqdomain: Allow quiet failure mode powerpc/pnv: Fix "compatible" property for P8 PHB powerpc/pci: Don't add bogus empty resources to PHBs powerpc/powerpnv: Properly handle failure starting CPUs powerpc/cputable: Advertise support for ISEL/HTM/DSCR/TAR on POWER8 powerpc/cputable: Advertise ISEL support on appropriate embedded processors powerpc/cputable: Advertise DSCR support on P7/P7+ powerpc/cputable: Reserve bits in HWCAP2 for new features powerpc/pseries: Perform proper max_bus_speed detection powerpc/pseries: Force 32 bit MSIs for devices that require it powerpc/tm: Fix null pointer deference in flush_hash_page powerpc/powernv: Defer OPAL exception handler registration powerpc: Emulate non privileged DSCR read and write
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Linus Torvalds authored
Merge rwsem optimizations from Michel Lespinasse: "These patches extend Alex Shi's work (which added write lock stealing on the rwsem slow path) in order to provide rwsem write lock stealing on the fast path (that is, without taking the rwsem's wait_lock). I have unfortunately been unable to push this through -next before due to Ingo Molnar / David Howells / Peter Zijlstra being busy with other things. However, this has gotten some attention from Rik van Riel and Davidlohr Bueso who both commented that they felt this was ready for v3.10, and Ingo Molnar has said that he was OK with me pushing directly to you. So, here goes :) Davidlohr got the following test results from pgbench running on a quad-core laptop: | db_size | clients | tps-vanilla | tps-rwsem | +---------+----------+----------------+--------------+ | 160 MB | 1 | 5803 | 6906 | + 19.0% | 160 MB | 2 | 13092 | 15931 | | 160 MB | 4 | 29412 | 33021 | | 160 MB | 8 | 32448 | 34626 | | 160 MB | 16 | 32758 | 33098 | | 160 MB | 20 | 26940 | 31343 | + 16.3% | 160 MB | 30 | 25147 | 28961 | | 160 MB | 40 | 25484 | 26902 | | 160 MB | 50 | 24528 | 25760 | ------------------------------------------------------ | 1.6 GB | 1 | 5733 | 7729 | + 34.8% | 1.6 GB | 2 | 9411 | 19009 | + 101.9% | 1.6 GB | 4 | 31818 | 33185 | | 1.6 GB | 8 | 33700 | 34550 | | 1.6 GB | 16 | 32751 | 33079 | | 1.6 GB | 20 | 30919 | 31494 | | 1.6 GB | 30 | 28540 | 28535 | | 1.6 GB | 40 | 26380 | 27054 | | 1.6 GB | 50 | 25241 | 25591 | ------------------------------------------------------ | 7.6 GB | 1 | 5779 | 6224 | | 7.6 GB | 2 | 10897 | 13611 | + 24.9% | 7.6 GB | 4 | 32683 | 33108 | | 7.6 GB | 8 | 33968 | 34712 | | 7.6 GB | 16 | 32287 | 32895 | | 7.6 GB | 20 | 27770 | 31689 | + 14.1% | 7.6 GB | 30 | 26739 | 29003 | | 7.6 GB | 40 | 24901 | 26683 | | 7.6 GB | 50 | 17115 | 25925 | + 51.5% ------------------------------------------------------ (Davidlohr also has one additional patch which further improves throughput, though I will ask him to send it directly to you as I have suggested some minor changes)." * emailed patches from Michel Lespinasse <walken@google.com>: rwsem: no need for explicit signed longs x86 rwsem: avoid taking slow path when stealing write lock rwsem: do not block readers at head of queue if other readers are active rwsem: implement support for write lock stealing on the fastpath rwsem: simplify __rwsem_do_wake rwsem: skip initial trylock in rwsem_down_write_failed rwsem: avoid taking wait_lock in rwsem_down_write_failed rwsem: use cmpxchg for trying to steal write lock rwsem: more agressive lock stealing in rwsem_down_write_failed rwsem: simplify rwsem_down_write_failed rwsem: simplify rwsem_down_read_failed rwsem: move rwsem_down_failed_common code into rwsem_down_{read,write}_failed rwsem: shorter spinlocked section in rwsem_down_failed_common() rwsem: make the waiter type an enumeration rather than a bitmask
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- May 07, 2013
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git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linuxLinus Torvalds authored
Pull slab changes from Pekka Enberg: "The bulk of the changes are more slab unification from Christoph. There's also few fixes from Aaron, Glauber, and Joonsoo thrown into the mix." * 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux: (24 commits) mm, slab_common: Fix bootstrap creation of kmalloc caches slab: Return NULL for oversized allocations mm: slab: Verify the nodeid passed to ____cache_alloc_node slub: tid must be retrieved from the percpu area of the current processor slub: Do not dereference NULL pointer in node_match slub: add 'likely' macro to inc_slabs_node() slub: correct to calculate num of acquired objects in get_partial_node() slub: correctly bootstrap boot caches mm/sl[au]b: correct allocation type check in kmalloc_slab() slab: Fixup CONFIG_PAGE_ALLOC/DEBUG_SLAB_LEAK sections slab: Handle ARCH_DMA_MINALIGN correctly slab: Common definition for kmem_cache_node slab: Rename list3/l3 to node slab: Common Kmalloc cache determination stat: Use size_t for sizes instead of unsigned slab: Common function to create the kmalloc array slab: Common definition for the array of kmalloc caches slab: Common constants for kmalloc boundaries slab: Rename nodelists to node slab: Common name for the per node structures ...
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuildLinus Torvalds authored
Pull misc kbuild updates from Michal Marek: "Non-critical kbuild changes: - make coccicheck improvements, but no new semantic patches this time - make rpm improvements - make tar-pkg change to include the architecture in the filename. This is a deliberate incompatibility, but nobody has complained so far and it is useful if you build for different architectures. It also matches what the deb-pkg and rpm-pkg targets produce. - kbuild documentation fix" * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: rpm-pkg: Remove pointless set -e statements rpm-pkg: Always regenerate the specfile rpm-pkg: Do not write to the parent directory rpm-pkg: Do not package the whole source directory buildtar: Add ARCH to the archive name Coccinelle: Fix patch output when coccicheck is used with M= and C= Coccinelle: Add support to the SPFLAGS variable Coccinelle: Cleanup the setting of the FLAGS and OPTIONS variables Coccinelle: Restore coccicheck verbosity in ONLINE mode (C=1 or C=2) scripts/package/Makefile: compare objtree with srctree instead of test KBUILD_OUTPUT doc: change example to existing Makefile fragment scripts/tags.sh: Add magic for OFFSET and DEFINE
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuildLinus Torvalds authored
Pull kconfig updates from Michal Marek: - use pkg-config to detect curses libraries - clean up the way curses headers are searched - Some randconfig fixes, of which one had to be reverted - KCONFIG_SEED for randconfig debugging - memuconfig memory leak plugged - menuconfig > breadcrumbs > navigation - xconfig compilation fix - Other minor fixes * 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kconfig: fix lists definition for C++ Revert "kconfig: fix randomising choice entries in presence of KCONFIG_ALLCONFIG" kconfig: implement KCONFIG_PROBABILITY for randconfig kconfig: allow specifying the seed for randconfig kconfig: fix randomising choice entries in presence of KCONFIG_ALLCONFIG kconfig: do not override symbols already set kconfig: fix randconfig tristate detection kconfig/lxdialog: rationalise the include paths where to find {.n}curses{,w}.h menuconfig: Add "breadcrumbs" navigation aid menuconfig: Fix memory leak introduced by jump keys feature merge_config.sh: Avoid creating unnessary source softlinks kconfig: optionally use pkg-config to detect ncurses libs menuconfig: optionally use pkg-config to detect ncurses libs
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuildLinus Torvalds authored
Pull kbuild changes from Michal Marek: "Kbuild commits for v3.10-rc1: - Fix make mrproper after mod/file2alias rework - Fix ld-option Makefile function - Rewrite headers_install to shell to drop Perl dependency. There are some more patches I have to look at, so I might send another pull request later. Or just queue them for 3.11." * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: Fix cleaning in scripts/mod headers_install.pl: convert to headers_install.sh kbuild: fix ld-option function
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Li Zefan authored
Searching for PPC_EFIKA results in a segmentation fault, and it's because get_symbol_prop() returns NULL. In this case CONFIG_PPC_EFIKA is defined in arch/powerpc/platforms/ 52xx/Kconfig, so it won't be parsed if ARCH!=PPC, but menuconfig knows this symbol when it parses sound/soc/fsl/Kconfig: config SND_MPC52xx_SOC_EFIKA tristate "SoC AC97 Audio support for bbplan Efika and STAC9766" depends on PPC_EFIKA This bug was introduced by commit bcdedcc1 ("menuconfig: print more info for symbol without prompts"). Reported-and-tested-by:
Borislav Petkov <bp@alien8.de> Signed-off-by:
Li Zefan <lizefan@huawei.com> Tested-by:
Libo Chen <libo.chen@huawei.com> Reviewed-by:
"Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by:
Michal Marek <mmarek@suse.cz> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Bruce Allan authored
A scheduling while atomic bug was introduced recently (by commit ce43a216 : "e1000e: cleanup USLEEP_RANGE checkpatch checks"). Revert the particular instance of usleep_range() which causes the bug. Reported-by:
Maarten Lankhorst <m.b.lankhorst@gmail.com> Signed-off-by:
Bruce Allan <bruce.w.allan@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Davidlohr Bueso authored
Change explicit "signed long" declarations into plain "long" as suggested by Peter Hurley. Signed-off-by:
Davidlohr Bueso <davidlohr.bueso@hp.com> Reviewed-by:
Michel Lespinasse <walken@google.com> Signed-off-by:
Michel Lespinasse <walken@google.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michel Lespinasse authored
modify __down_write[_nested] and __down_write_trylock to grab the write lock whenever the active count is 0, even if there are queued waiters (they must be writers pending wakeup, since the active count is 0). Note that this is an optimization only; architectures without this optimization will still work fine: - __down_write() would take the slow path which would take the wait_lock and then try stealing the lock (as in the spinlocked rwsem implementation) - __down_write_trylock() would fail, but callers must be ready to deal with that - since there are some writers pending wakeup, they could have raced with us and obtained the lock before we steal it. Signed-off-by:
Michel Lespinasse <walken@google.com> Reviewed-by:
Peter Hurley <peter@hurleysoftware.com> Acked-by:
Davidlohr Bueso <davidlohr.bueso@hp.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michel Lespinasse authored
This change fixes a race condition where a reader might determine it needs to block, but by the time it acquires the wait_lock the rwsem has active readers and no queued waiters. In this situation the reader can run in parallel with the existing active readers; it does not need to block until the active readers complete. Thanks to Peter Hurley for noticing this possible race. Signed-off-by:
Michel Lespinasse <walken@google.com> Reviewed-by:
Peter Hurley <peter@hurleysoftware.com> Acked-by:
Davidlohr Bueso <davidlohr.bueso@hp.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michel Lespinasse authored
When we decide to wake up readers, we must first grant them as many read locks as necessary, and then actually wake up all these readers. But in order to know how many read shares to grant, we must first count the readers at the head of the queue. This might take a while if there are many readers, and we want to be protected against a writer stealing the lock while we're counting. To that end, we grant the first reader lock before counting how many more readers are queued. We also require some adjustments to the wake_type semantics. RWSEM_WAKE_NO_ACTIVE used to mean that we had found the count to be RWSEM_WAITING_BIAS, in which case the rwsem was known to be free as nobody could steal it while we hold the wait_lock. This doesn't make sense once we implement fastpath write lock stealing, so we now use RWSEM_WAKE_ANY in that case. Similarly, when rwsem_down_write_failed found that a read lock was active, it would use RWSEM_WAKE_READ_OWNED which signalled that new readers could be woken without checking first that the rwsem was available. We can't do that anymore since the existing readers might release their read locks, and a writer could steal the lock before we wake up additional readers. So, we have to use a new RWSEM_WAKE_READERS value to indicate we only want to wake readers, but we don't currently hold any read lock. Signed-off-by:
Michel Lespinasse <walken@google.com> Reviewed-by:
Peter Hurley <peter@hurleysoftware.com> Acked-by:
Davidlohr Bueso <davidlohr.bueso@hp.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michel Lespinasse authored
This is mostly for cleanup value: - We don't need several gotos to handle the case where the first waiter is a writer. Two simple tests will do (and generate very similar code). - In the remainder of the function, we know the first waiter is a reader, so we don't have to double check that. We can use do..while loops to iterate over the readers to wake (generates slightly better code). Signed-off-by:
Michel Lespinasse <walken@google.com> Reviewed-by:
Peter Hurley <peter@hurleysoftware.com> Acked-by:
Davidlohr Bueso <davidlohr.bueso@hp.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michel Lespinasse authored
We can skip the initial trylock in rwsem_down_write_failed() if there are known active lockers already, thus saving one likely-to-fail cmpxchg. Signed-off-by:
Michel Lespinasse <walken@google.com> Reviewed-by:
Peter Hurley <peter@hurleysoftware.com> Acked-by:
Davidlohr Bueso <davidlohr.bueso@hp.com> Acked-by:
Rik van Riel <riel@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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