linux-kernel - Re: [RFC PATCH v5] sched: Fix performance regression introduced by mm

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Message-ID: <20230413143744.GA221757@ziqianlu-desk2>
Date:   Thu, 13 Apr 2023 22:37:44 +0800
From:   Aaron Lu <aaron.lu@...el.com>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
CC:     Peter Zijlstra <peterz@...radead.org>,
        <linux-kernel@...r.kernel.org>, Olivier Dion <odion@...icios.com>,
        <michael.christie@...cle.com>
Subject: Re: [RFC PATCH v5] sched: Fix performance regression introduced by
 mm_cid

On Thu, Apr 13, 2023 at 10:02:48AM -0400, Mathieu Desnoyers wrote:
> Introduce per-mm/cpu current concurrency id (mm_cid) to fix a PostgreSQL
> sysbench regression reported by Aaron Lu.
 
Initial test using postgres_sysbench showed the lock contention is gone :-)
Will check how it affects hackbench tomorrow.