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| author |   Michal Schmidt <mschmidt@redhat.com> | 2024-09-30 22:13:07 +0200 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2024-10-04 09:25:15 -0700 |
| commit | 2efeaf1d2a13f4b7419d60cd145ac84a3c151214 (patch) | |
| tree | 4dee535f7d2fb7e15519285e11a0326a98337866 /net/socket.c | |
| parent | qed: allow the callee of qed_mcp_nvm_read() to sleep (diff) | |
| download | linux-rng-2efeaf1d2a13f4b7419d60cd145ac84a3c151214.tar.xz linux-rng-2efeaf1d2a13f4b7419d60cd145ac84a3c151214.zip | |
qed: put cond_resched() in qed_dmae_operation_wait()
It is OK to sleep in qed_dmae_operation_wait, because it is called only
in process context, while holding p_hwfn->dmae_info.mutex from one of
the qed_dmae_{host,grc}2{host,grc} functions.
The udelay(DMAE_MIN_WAIT_TIME=2) in the function is too short to replace
with usleep_range, but at least it's a suitable point for checking if we
should give up the CPU with cond_resched().
This lowers the latency caused by 'ethtool -d' from 10 ms to less than
2 ms on my test system with voluntary preemption.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Link: https://patch.msgid.link/20240930201307.330692-5-mschmidt@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/socket.c')
0 files changed, 0 insertions, 0 deletions