fs/pipe: write to ->poll_usage only once

Browse source

Both GNU and BSD makes share a "token pipe" between their instances, as
a result a -j $BIGNUM invocation results in multicore perf problems in
the poll handler.

Avoiding the store will reduce it a little bit. However, the crux of the
problem is the locked queuing up in poll_wait().

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20260516021852.256932-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

...

This commit is contained in:

Mateusz Guzik 2026-05-16 04:18:52 +02:00 • committed by Christian Brauner

parent 50d377ef12

commit 7dc6acb3d5

No known key found for this signature in database

GPG key ID: 91C61BC06578DCA2

1 changed files with 2 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

fs/pipe.c

View file