From: Saeed Mirzamohammadi <saeed.mirzamohammadi@oracle.com>
To: stable@vger.kernel.org
Cc: saeed.mirzamohammadi@oracle.com,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Luis Chamberlain <mcgrof@kernel.org>,
Kees Cook <keescook@chromium.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: [PATCH 5.4 0/1] mm: allow a controlled amount of unfairness in the page lock
Date: Mon, 21 Aug 2023 15:25:45 -0700 [thread overview]
Message-ID: <20230821222547.483583-1-saeed.mirzamohammadi@oracle.com> (raw)
We observed a 35% of regression running phoronix pts/ramspeed and also 16%
with unixbench. Regression is caused by the following commit:
dd0f194cfeb5 | mm: rewrite wait_on_page_bit_common() logic
Backporting this fixes the regression (this is already in 5.9+):
- 5ef64cc8987a mm: allow a controlled amount of unfairness in the page lock
Linus Torvalds (1):
mm: allow a controlled amount of unfairness in the page lock
include/linux/mm.h | 2 +
include/linux/wait.h | 2 +
kernel/sysctl.c | 8 +++
mm/filemap.c | 160 ++++++++++++++++++++++++++++++++++---------
4 files changed, 141 insertions(+), 31 deletions(-)
--
2.41.0
next reply other threads:[~2023-08-21 22:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-21 22:25 Saeed Mirzamohammadi [this message]
2023-08-21 22:25 ` [PATCH 5.4 1/1] " Saeed Mirzamohammadi
2023-08-22 7:08 ` [PATCH 5.4 0/1] " Greg KH
2023-08-22 17:20 ` Saeed Mirzamohammadi
2023-08-27 8:52 ` Greg KH
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