On Mon, Mar 15, 2021 at 4:41 PM Johannes Weiner <hannes@xxxxxxxxxxx> wrote: > > Fix a sleep in atomic section problem: wb_writeback() takes a spinlock > and calls wb_over_bg_thresh() -> mem_cgroup_wb_stats, but the regular > rstat flushing function called from in there does lockbreaking and may > sleep. Switch to the atomic variant, cgroup_rstat_irqsafe(). > > To be consistent with other memcg flush calls, but without adding > another memcg wrapper, inline and drop memcg_flush_vmstats() instead. > > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
