linux-kernel - Re: [PATCH 5.4 0/1] mm: allow a controlled amount of unfairness in the page lock

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Message-ID: <2023082248-parting-backed-2ab0@gregkh>
Date:   Tue, 22 Aug 2023 09:08:18 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Saeed Mirzamohammadi <saeed.mirzamohammadi@...cle.com>
Cc:     stable@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 5.4 0/1] mm: allow a controlled amount of unfairness in
 the page lock

On Mon, Aug 21, 2023 at 03:25:45PM -0700, Saeed Mirzamohammadi wrote:
> 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

That is not a valid git id in Linus's or in the linux-stable repo that I
can see.  Are you sure that it is correct?

thanks,

greg k-h