linux-kernel - Re: [PATCH 4.20 71/92] Revert "mm: slowly shrink slabs with a relatively small number of objects"

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Message-ID: <a998a5028aa3bb17a5a60fffd3db558223b84cd5.camel@surriel.com>
Date:   Mon, 18 Feb 2019 10:30:44 -0500
From:   Rik van Riel <riel@...riel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, Dave Chinner <dchinner@...hat.com>,
        Wolfgang Walter <linux@...m.de>, Roman Gushchin <guro@...com>,
        Spock <dairinin@...il.com>, Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 4.20 71/92] Revert "mm: slowly shrink slabs with a
 relatively small number of objects"

On Mon, 2019-02-18 at 14:43 +0100, Greg Kroah-Hartman wrote:
> 4.20-stable review patch.  If anyone has any objections, please let
> me know.
> 
> ------------------
> 
> From: Dave Chinner <dchinner@...hat.com>
> 
> commit a9a238e83fbb0df31c3b9b67003f8f9d1d1b6c96 upstream.
> 
> This reverts commit 172b06c32b9497 ("mm: slowly shrink slabs with a
> relatively small number of objects").

This revert will result in the slab caches of dead
cgroups with a small number of remaining objects never
getting reclaimed, which can be a memory leak in some
configurations.

But hey, that's your tradeoff to make.

-- 
All Rights Reversed.

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