Merge branch 'for-rmk/barriers' of... (cdf0bfb0) · Commits · EulixOS / Software / Kernel

.gitignore

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		@@ -29,6 +29,7 @@ modules.builtin
		*.bz2
		*.lzma
		*.xz
		*.lz4
		*.lzo
		*.patch
		*.gcno

Documentation/ABI/testing/sysfs-driver-xen-blkback

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		What: /sys/module/xen_blkback/parameters/max_buffer_pages
		Date: March 2013
		KernelVersion: 3.11
		Contact: Roger Pau Monné <roger.pau@citrix.com>
		Description:
		Maximum number of free pages to keep in each block
		backend buffer.

		What: /sys/module/xen_blkback/parameters/max_persistent_grants
		Date: March 2013
		KernelVersion: 3.11
		Contact: Roger Pau Monné <roger.pau@citrix.com>
		Description:
		Maximum number of grants to map persistently in
		blkback. If the frontend tries to use more than
		max_persistent_grants, the LRU kicks in and starts
		removing 5% of max_persistent_grants every 100ms.

Documentation/ABI/testing/sysfs-driver-xen-blkfront

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		What: /sys/module/xen_blkfront/parameters/max
		Date: June 2013
		KernelVersion: 3.11
		Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
		Description:
		Maximum number of segments that the frontend will negotiate
		with the backend for indirect descriptors. The default value
		is 32 - higher value means more potential throughput but more
		memory usage. The backend picks the minimum of the frontend
		and its default backend value.

Documentation/DocBook/device-drivers.tmpl

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		@@ -84,7 +84,7 @@ X!Iinclude/linux/kobject.h

		<sect1><title>Kernel utility functions</title>
		!Iinclude/linux/kernel.h
		!Ekernel/printk.c
		!Ekernel/printk/printk.c
		!Ekernel/panic.c
		!Ekernel/sys.c
		!Ekernel/rcupdate.c

Documentation/bcache.txt

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		@@ -46,29 +46,33 @@ you format your backing devices and cache device at the same time, you won't
		have to manually attach:
		make-bcache -B /dev/sda /dev/sdb -C /dev/sdc

		To make bcache devices known to the kernel, echo them to /sys/fs/bcache/register:
		bcache-tools now ships udev rules, and bcache devices are known to the kernel
		immediately. Without udev, you can manually register devices like this:

		echo /dev/sdb > /sys/fs/bcache/register
		echo /dev/sdc > /sys/fs/bcache/register

		To register your bcache devices automatically, you could add something like
		this to an init script:
		Registering the backing device makes the bcache device show up in /dev; you can
		now format it and use it as normal. But the first time using a new bcache
		device, it'll be running in passthrough mode until you attach it to a cache.
		See the section on attaching.

		echo /dev/sd* > /sys/fs/bcache/register_quiet
		The devices show up as:

		It'll look for bcache superblocks and ignore everything that doesn't have one.
		/dev/bcache<N>

		Registering the backing device makes the bcache show up in /dev; you can now
		format it and use it as normal. But the first time using a new bcache device,
		it'll be running in passthrough mode until you attach it to a cache. See the
		section on attaching.
		As well as (with udev):

		The devices show up at /dev/bcacheN, and can be controlled via sysfs from
		/sys/block/bcacheN/bcache:
		/dev/bcache/by-uuid/<uuid>
		/dev/bcache/by-label/<label>

		To get started:

		mkfs.ext4 /dev/bcache0
		mount /dev/bcache0 /mnt

		You can control bcache devices through sysfs at /sys/block/bcache<N>/bcache .

		Cache devices are managed as sets; multiple caches per set isn't supported yet
		but will allow for mirroring of metadata and dirty data in the future. Your new
		cache set shows up as /sys/fs/bcache/<UUID>
		@@ -80,11 +84,11 @@ must be attached to your cache set to enable caching. Attaching a backing
		device to a cache set is done thusly, with the UUID of the cache set in
		/sys/fs/bcache:

		echo <UUID> > /sys/block/bcache0/bcache/attach
		echo <CSET-UUID> > /sys/block/bcache0/bcache/attach

		This only has to be done once. The next time you reboot, just reregister all
		your bcache devices. If a backing device has data in a cache somewhere, the
		/dev/bcache# device won't be created until the cache shows up - particularly
		/dev/bcache<N> device won't be created until the cache shows up - particularly
		important if you have writeback caching turned on.

		If you're booting up and your cache device is gone and never coming back, you
		@@ -191,6 +195,9 @@ want for getting the best possible numbers when benchmarking.

		SYSFS - BACKING DEVICE:

		Available at /sys/block/<bdev>/bcache, /sys/block/bcache*/bcache and
		(if attached) /sys/fs/bcache/<cset-uuid>/bdev*

		attach
		Echo the UUID of a cache set to this file to enable caching.

		@@ -300,6 +307,8 @@ cache_readaheads

		SYSFS - CACHE SET:

		Available at /sys/fs/bcache/<cset-uuid>

		average_key_size
		Average data per key in the btree.

		@@ -390,6 +399,8 @@ trigger_gc

		SYSFS - CACHE DEVICE:

		Available at /sys/block/<cdev>/bcache

		block_size
		Minimum granularity of writes - should match hardware sector size.