On Thu, May 26, 2022 at 09:55:12AM +0800, Zqiang wrote: > When an RCU grace period starts and at this time the CPU is in > the process of going offline, if the RCU gp-fqs occurs during the > time period when the CPU has passed the stop-machine but has not > yet entered the idle loop, and this CPU have not report quiescent > state yet, its urgent flags maybe is set, for example due to cbovld > is true, but this CPUs rcu urgent flags is not cleanup in rcu_report_dead() > when report qs. however for CPU that have been report qs, its rcu > urgent flags should cleanup, so add rcu_disable_urgency_upon_qs() > in rcu_report_dead() when CPU report qs. > > Signed-off-by: Zqiang <qiang1.zhang@xxxxxxxxx> Good catch, thank you! I have queued this on -rcu, and it will become visible on kernel.org on my next rebase. Assuming good test results and no objections from reviews, I will submit this not to the current merge window, but to the next merge window (v5.20). Thanx, Paul
