admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
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>
This commit is contained in:
Tejun Heo
2025-11-05 12:03:08 -10:00
parent d723f36e01
commit 5a629ecbcd
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
kernel/sched/ext_internal.h
View File

@@ -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;