Commit 5a629ecb authored by Tejun Heo's avatar Tejun Heo
Browse files

sched_ext: Mark racy bitfields to prevent adding fields that can't tolerate races 



The warned bitfields in struct scx_sched are updated racily from concurrent
CPUs causing RMW races, which is fine for these boolean warning flags. Add a
comment marking this area to prevent future fields that can't tolerate racy
updates from being added here.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent d723f36e

kernel/sched/ext_internal.h

+4 −0
Original line number Diff line number Diff line
@@ -895,6 +895,10 @@ struct scx_sched { 
	struct scx_dispatch_q	**global_dsqs;

	struct scx_sched_pcpu __percpu *pcpu;



	/*

	 * Updates to the following warned bitfields can race causing RMW issues

	 * but it doesn't really matter.

	 */

	bool			warned_zero_slice:1;

	bool			warned_deprecated_rq:1;