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| author | Yan Zhai <yan@cloudflare.com> | 2024-03-19 13:44:34 -0700 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-26 18:20:12 -0400 |
| commit | c2619021451216fd7be9d6695ec1cf826ab3dc71 (patch) | |
| tree | da185b116f5c85598d9f0b3d45753e64458f9c48 /net/core/dev.c | |
| parent | 4d37f12707ee965d338028732575f0b85f6d9e4f (diff) | |
rcu: add a helper to report consolidated flavor QS
[ Upstream commit 1a77557d48cff187a169c2aec01c0dd78a5e7e50 ]
When under heavy load, network processing can run CPU-bound for many
tens of seconds. Even in preemptible kernels (non-RT kernel), this can
block RCU Tasks grace periods, which can cause trace-event removal to
take more than a minute, which is unacceptably long.
This commit therefore creates a new helper function that passes through
both RCU and RCU-Tasks quiescent states every 100 milliseconds. This
hard-coded value suffices for current workloads.
Suggested-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: Yan Zhai <yan@cloudflare.com>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Link: https://lore.kernel.org/r/90431d46ee112d2b0af04dbfe936faaca11810a5.1710877680.git.yan@cloudflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: d6dbbb11247c ("net: report RCU QS on threaded NAPI repolling")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/core/dev.c')
0 files changed, 0 insertions, 0 deletions