Commit fcb71f6f authored by FD Cami's avatar FD Cami Committed by Jeff Garzik
Browse files

Update kernel parameter document for libata DMA mode setting knobs. 



Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 4ccd3329

Documentation/kernel-parameters.txt

+8 −0
Original line number Diff line number Diff line
@@ -883,6 +883,14 @@ and is between 256 and 4096 characters. It is defined in the file 
	lapic_timer_c2_ok	[X86-32,x86-64,APIC] trust the local apic timer in

			C2 power state.



	libata.dma=	[LIBATA] DMA control

			libata.dma=0	  Disable all PATA and SATA DMA

			libata.dma=1	  PATA and SATA Disk DMA only

			libata.dma=2	  ATAPI (CDROM) DMA only

			libata.dma=4	  Compact Flash DMA only 

			Combinations also work, so libata.dma=3 enables DMA

			for disks and CDROMs, but not CFs.



	libata.noacpi	[LIBATA] Disables use of ACPI in libata suspend/resume

			when set.

			Format: <int>