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| author |   Shrikanth Hegde <sshegde@linux.ibm.com> | 2025-03-06 10:59:54 +0530 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2025-03-06 10:21:31 +0100 |
| commit | b1536481c81fb604074da799e4f2d2038a1663f7 (patch) | |
| tree | c42c590abcb5eed4062e028738a97d17e94f876d /net/lapb/lapb_timer.c | |
| parent | sched/deadline: Use online cpus for validating runtime (diff) | |
| download | wireguard-linux-b1536481c81fb604074da799e4f2d2038a1663f7.tar.xz wireguard-linux-b1536481c81fb604074da799e4f2d2038a1663f7.zip | |
sched/rt: Update limit of sched_rt sysctl in documentation
By default fair_server dl_server allocates 5% of the bandwidth to the root
domain. Due to this writing any value less than 5% fails due to -EBUSY:
$ cat /proc/sys/kernel/sched_rt_period_us
1000000
$ echo 49999 > /proc/sys/kernel/sched_rt_runtime_us
-bash: echo: write error: Device or resource busy
$ echo 50000 > /proc/sys/kernel/sched_rt_runtime_us
$
Since the sched_rt_runtime_us allows -1 as the minimum, put this
restriction in the documentation.
One should check average of runtime/period in
/sys/kernel/debug/sched/fair_server/cpuX/* for exact value.
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Juri Lelli <juri.lelli@redhat.com>
Link: https://lore.kernel.org/r/20250306052954.452005-3-sshegde@linux.ibm.com
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions