Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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: Tejun Heo <tj@kernel.org>
+4
+4
kernel/sched/ext_internal.h
+4
kernel/sched/ext_internal.h
···
895
895
struct scx_dispatch_q **global_dsqs;
896
896
struct scx_sched_pcpu __percpu *pcpu;
897
897
898
+
/*
899
+
* Updates to the following warned bitfields can race causing RMW issues
900
+
* but it doesn't really matter.
901
+
*/
898
902
bool warned_zero_slice:1;
899
903
bool warned_deprecated_rq:1;
900
904