Commit fa99165c authored by Marcos Paulo de Souza's avatar Marcos Paulo de Souza Committed by Jens Axboe
Browse files

Documentation:kernel-per-CPU-kthreads.txt: Remove reference to elevator= 



This argument was not being considered since blk-mq was set by default,
so removed this documentation to avoid confusion.

Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarMarcos Paulo de Souza <marcos.souza.org@gmail.com>

.txt file is now .rst

Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent f97eeb6c

Documentation/admin-guide/kernel-per-CPU-kthreads.rst

+3 −5
Original line number Diff line number Diff line
@@ -274,9 +274,7 @@ To reduce its OS jitter, do any of the following: 
		(based on an earlier one from Gilad Ben-Yossef) that

		reduces or even eliminates vmstat overhead for some

		workloads at https://lkml.org/lkml/2013/9/4/379.

	e.	Boot with "elevator=noop" to avoid workqueue use by

		the block layer.

	f.	If running on high-end powerpc servers, build with

	e.	If running on high-end powerpc servers, build with

		CONFIG_PPC_RTAS_DAEMON=n.  This prevents the RTAS

		daemon from running on each CPU every second or so.

		(This will require editing Kconfig files and will defeat
@@ -284,12 +282,12 @@ To reduce its OS jitter, do any of the following: 
		due to the rtas_event_scan() function.

		WARNING:  Please check your CPU specifications to

		make sure that this is safe on your particular system.

	g.	If running on Cell Processor, build your kernel with

	f.	If running on Cell Processor, build your kernel with

		CBE_CPUFREQ_SPU_GOVERNOR=n to avoid OS jitter from

		spu_gov_work().

		WARNING:  Please check your CPU specifications to

		make sure that this is safe on your particular system.

	h.	If running on PowerMAC, build your kernel with

	g.	If running on PowerMAC, build your kernel with

		CONFIG_PMAC_RACKMETER=n to disable the CPU-meter,

		avoiding OS jitter from rackmeter_do_timer().

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