signal: Add a proper comment about preempt_disable() in ptrace_stop()

Browse source

Commit 53da1d9456 ("fix ptrace slowness") added a preempt-disable section
between read_unlock() and the following schedule() invocation without
explaining why it is needed.

Replace the existing contentless comment with a proper explanation to
clarify that it is not needed for correctness but for performance reasons.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20230803100932.325870-2-bigeasy@linutronix.de

...

This commit is contained in:

Sebastian Andrzej Siewior 2023-08-03 12:09:31 +02:00 • committed by Thomas Gleixner

parent 0bb80ecc33

commit a20d6f63db

1 changed files with 15 additions and 3 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

18

kernel/signal.c

View file