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: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com> .txt file is now .rst Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -274,9 +274,7 @@ To reduce its OS jitter, do any of the following:
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(based on an earlier one from Gilad Ben-Yossef) that
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reduces or even eliminates vmstat overhead for some
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workloads at https://lkml.org/lkml/2013/9/4/379.
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e. Boot with "elevator=noop" to avoid workqueue use by
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the block layer.
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f. If running on high-end powerpc servers, build with
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e. If running on high-end powerpc servers, build with
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CONFIG_PPC_RTAS_DAEMON=n. This prevents the RTAS
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daemon from running on each CPU every second or so.
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(This will require editing Kconfig files and will defeat
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@ -284,12 +282,12 @@ To reduce its OS jitter, do any of the following:
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due to the rtas_event_scan() function.
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WARNING: Please check your CPU specifications to
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make sure that this is safe on your particular system.
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g. If running on Cell Processor, build your kernel with
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f. If running on Cell Processor, build your kernel with
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CBE_CPUFREQ_SPU_GOVERNOR=n to avoid OS jitter from
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spu_gov_work().
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WARNING: Please check your CPU specifications to
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make sure that this is safe on your particular system.
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h. If running on PowerMAC, build your kernel with
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g. If running on PowerMAC, build your kernel with
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CONFIG_PMAC_RACKMETER=n to disable the CPU-meter,
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avoiding OS jitter from rackmeter_do_timer().
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