mirror of
https://github.com/raspberrypi/linux.git
synced 2025-12-08 02:49:48 +00:00
[ Upstream commitebb83d84e4] After commit8ad075c2eb("sched: Async unthrottling for cfs bandwidth"), we may update the rq clock multiple times in the loop of __cfsb_csd_unthrottle(). A prior (although less common) instance of this problem exists in unthrottle_offline_cfs_rqs(). Cure both by ensuring update_rq_clock() is called before the loop and setting RQCF_ACT_SKIP during the loop, to supress further updates. The alternative would be pulling update_rq_clock() out of unthrottle_cfs_rq(), but that gives an even bigger mess. Fixes:8ad075c2eb("sched: Async unthrottling for cfs bandwidth") Reviewed-By: Ben Segall <bsegall@google.com> Suggested-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Hao Jia <jiahao.os@bytedance.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org> Link: https://lkml.kernel.org/r/20230613082012.49615-4-jiahao.os@bytedance.com Signed-off-by: Sasha Levin <sashal@kernel.org>