linux-kernel - Re: [rfc/patch] mm/slub: restore/expand unfreeze

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Date:   Wed, 28 Jul 2021 18:59:24 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Mike Galbraith <efault@....de>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     linux-rt-users@...r.kernel.org,
        Mel Gorman <mgorman@...hsingularity.net>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [rfc/patch] mm/slub: restore/expand unfreeze_partials() local
 exclusion scope

On 7/27/21 6:09 AM, Mike Galbraith wrote:
> On Mon, 2021-07-26 at 23:26 +0200, Vlastimil Babka wrote:
>> On 7/26/21 7:00 PM, Mike Galbraith wrote:
>>>
>>> Why not do something like the below?...
>>
>> Yep, sounds like a good approach, thanks. Percpu partial is not *the*
>> SLUB fast path, so it should be sufficient without the lockless cmpxchg
>> tricks. Will incorporate in updated series.

The updated series incorporating hopefully all fixes from Mike and
bigeasy, and rebased to 5.14-rc3 (Thomas told me RT is moving to it), is
here:

https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=slub-local-lock-v3r0

I'll post it to linux-mm tomorrow.