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| author | Marcos Paulo de Souza <marcos.souza.org@gmail.com> | 2019-09-03 16:05:37 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-09-03 16:05:37 +0200 |
| commit | fa99165cc87a306d11ef6752e606e3f07b1a994e (patch) | |
| tree | 1d1e4044c5c830dece1f1b2357cf205df75b0027 /Documentation/admin-guide/kernel-per-CPU-kthreads.rst | |
| parent | Documenation: switching-sched: Remove notes about elevator argument (diff) | |
| download | linux-fa99165cc87a306d11ef6752e606e3f07b1a994e.tar.xz linux-fa99165cc87a306d11ef6752e606e3f07b1a994e.zip | |
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>
Diffstat (limited to 'Documentation/admin-guide/kernel-per-CPU-kthreads.rst')
| -rw-r--r-- | Documentation/admin-guide/kernel-per-CPU-kthreads.rst | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst index 4f18456dd3b1..baeeba8762ae 100644 --- a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst +++ b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst @@ -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(). |