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authorHao Jia <jiahao.os@bytedance.com>2023-06-13 16:20:11 +0800
committerPeter Zijlstra <peterz@infradead.org>2023-06-16 22:08:13 +0200
commitebb83d84e49b54369b0db67136a5fe1087124dcc (patch)
treeb0db940a0de97b2759308c5bbb715a08f0d6513e /arch/loongarch/pci/acpi.c
parent96500560f0c73c71bca1b27536c6254fa0e8ce37 (diff)
sched/core: Avoid multiple calling update_rq_clock() in __cfsb_csd_unthrottle()
After commit 8ad075c2eb1f ("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: 8ad075c2eb1f ("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
Diffstat (limited to 'arch/loongarch/pci/acpi.c')
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