linux

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Files

Breno Leitao bf3624cf1c netdevsim: call napi_schedule from a timer context

The netdevsim driver was experiencing NOHZ tick-stop errors during packet
transmission due to pending softirq work when calling napi_schedule().
This issue was observed when running the netconsole selftest, which
triggered the following error message:

  NOHZ tick-stop error: local softirq work is pending, handler #08!!!

To fix this issue, introduce a timer that schedules napi_schedule()
from a timer context instead of calling it directly from the TX path.

Create an hrtimer for each queue and kick it from the TX path,
which then schedules napi_schedule() from the timer context.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20250219-netdevsim-v3-1-811e2b8abc4c@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

2025-02-20 13:18:31 -08:00

bpf.c

netdevsim: Don't accept device bound programs

2023-11-23 13:04:04 -08:00

bus.c

netdevsim: allow two netdevsim ports to be connected

2024-03-01 10:43:10 +00:00

dev.c

netdevsim: use cond_resched() in nsim_dev_trap_report_work()

2024-10-15 09:58:43 -07:00

ethtool.c

netdevsim: don't assume core pre-populates HDS params on GET