diff options
| author | Jason A. Donenfeld <[email protected]> | 2020-05-06 15:33:04 -0600 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2020-05-06 20:03:47 -0700 |
| commit | 4005f5c3c9d006157ba716594e0d70c88a235c5e (patch) | |
| tree | d275974f4516371281eb5d8dc1b508a02b2e242e /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | b673e24aad36981f327a6570412ffa7754de8911 (diff) | |
wireguard: send/receive: cond_resched() when processing worker ringbuffers
Users with pathological hardware reported CPU stalls on CONFIG_
PREEMPT_VOLUNTARY=y, because the ringbuffers would stay full, meaning
these workers would never terminate. That turned out not to be okay on
systems without forced preemption, which Sultan observed. This commit
adds a cond_resched() to the bottom of each loop iteration, so that
these workers don't hog the core. Note that we don't need this on the
napi poll worker, since that terminates after its budget is expended.
Suggested-by: Sultan Alsawaf <[email protected]>
Reported-by: Wang Jian <[email protected]>
Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions