From: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
axboe@kernel.dk
Cc: Marcos Paulo de Souza <marcos.souza.org@gmail.com>,
Hannes Reinecke <hare@suse.com>
Subject: [RESEND PATCH 4/4] Documentation:kernel-per-CPU-kthreads.txt: Remove reference to elevator=
Date: Tue, 27 Aug 2019 22:19:30 -0300 [thread overview]
Message-ID: <20190828011930.29791-5-marcos.souza.org@gmail.com> (raw)
In-Reply-To: <20190828011930.29791-1-marcos.souza.org@gmail.com>
This argument was not being considered since blk-mq was set by default,
so removed this documentation to avoid confusion.
Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
Documentation/kernel-per-CPU-kthreads.txt | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/Documentation/kernel-per-CPU-kthreads.txt b/Documentation/kernel-per-CPU-kthreads.txt
index 5623b9916411..c68c6c8c26a4 100644
--- a/Documentation/kernel-per-CPU-kthreads.txt
+++ b/Documentation/kernel-per-CPU-kthreads.txt
@@ -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().
--
2.22.0
next prev parent reply other threads:[~2019-08-28 1:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-28 1:19 [RESEND PATCH 0/4] Remove elevator kernel parameter Marcos Paulo de Souza
2019-08-28 1:19 ` [RESEND PATCH 1/4] block: elevator.c: Remove now unused elevator= argument Marcos Paulo de Souza
2019-08-28 1:19 ` [RESEND PATCH 2/4] kernel-parameters.txt: Remove elevator argument Marcos Paulo de Souza
2019-08-28 1:19 ` [RESEND PATCH 3/4] Documenation: switching-sched: Remove notes about " Marcos Paulo de Souza
2019-08-28 1:19 ` Marcos Paulo de Souza [this message]
2019-09-01 23:29 ` [PATCH v2 0/4] Remove elevator kernel parameter Marcos Paulo de Souza
2019-09-01 23:29 ` [PATCH v2 1/4] block: elevator.c: Remove now unused elevator= argument Marcos Paulo de Souza
2019-09-03 9:06 ` Christoph Hellwig
2019-09-01 23:29 ` [PATCH v2 2/4] kernel-parameters.txt: Remove elevator argument Marcos Paulo de Souza
2019-09-03 9:06 ` Christoph Hellwig
2019-09-01 23:29 ` [PATCH v2 3/4] Documenation: switching-sched: Remove notes about " Marcos Paulo de Souza
2019-09-03 9:06 ` Christoph Hellwig
2019-09-01 23:29 ` [PATCH v2 4/4] Documentation:kernel-per-CPU-kthreads.txt: Remove reference to elevator= Marcos Paulo de Souza
2019-09-03 9:07 ` Christoph Hellwig
2019-09-03 14:06 ` [RESEND PATCH 0/4] Remove elevator kernel parameter Jens Axboe
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