kasan: Record work creation stack trace with interrupts enabled

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Recording the work creation stack trace for KASAN reports in
call_rcu() is expensive, due to unwinding the stack, but also
due to acquiring depot_lock inside stackdepot (which may be contended).
Because calling kasan_record_aux_stack_noalloc() does not require
interrupts to already be disabled, this may unnecessarily extend
the time with interrupts disabled.

Therefore, move calling kasan_record_aux_stack() before the section
with interrupts disabled.

Acked-by: Marco Elver <elver@google.com>
Signed-off-by: Zqiang <qiang1.zhang@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Zqiang 2021-12-26 08:52:04 +08:00 • committed by Paul E. McKenney

parent 1fe09ebe7a

commit d818cc76e2

1 changed files with 1 additions and 1 deletions

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kernel/rcu/tree.c

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