On Mon, Dec 04, 2023 at 03:49:01PM -0800, Yosry Ahmed wrote: [...] > > From 19af26e01f93cbf0806d75a234b78e48c1ce9d80 Mon Sep 17 00:00:00 2001 > From: Yosry Ahmed <yosryahmed@xxxxxxxxxx> > Date: Mon, 4 Dec 2023 23:43:29 +0000 > Subject: [PATCH] mm: memcg: remove stats flushing mutex > > The mutex was intended to make the waiters sleep instead of spin, and > such that we can check the update thresholds again after acquiring the > mutex. However, the mutex has a risk of priority inversion, especially > since the underlying rstat lock can de dropped while the mutex is held. > > Synthetic testing with high concurrency of flushers shows no > regressions without the mutex, so remove it. > > Suggested-by: Shakeel Butt <shakeelb@xxxxxxxxxx> > Signed-off-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx> Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
