On Tue, Jul 28, 2020 at 6:53 AM Johannes Weiner <[email protected]> wrote: > > Commit 8c8c383c04f6 ("mm: memcontrol: try harder to set a new > memory.high") inadvertently removed a callback to recalculate the > writeback cache size in light of a newly configured memory.high limit. > > Without letting the writeback cache know about a potentially heavily > reduced limit, it may permit too many dirty pages, which can cause > unnecessary reclaim latencies or even avoidable OOM situations. > > This was spotted while reading the code, it hasn't knowingly caused > any problems in practice so far. > > Fixes: 8c8c383c04f6 ("mm: memcontrol: try harder to set a new memory.high") > Signed-off-by: Johannes Weiner <[email protected]>
Reviewed-by: Shakeel Butt <[email protected]>
