linux-kernel - Re: Stuck looping on list_empty(list) in free_pcppages

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Message-ID: <YS5fp8ZKvw1Xnkgf@sultan-box.localdomain>
Date:   Tue, 31 Aug 2021 09:58:15 -0700
From:   Sultan Alsawaf <sultan@...neltoast.com>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     linux-mm@...ck.org, mhocko@...e.com, mgorman@...hsingularity.net,
        akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: Stuck looping on list_empty(list) in free_pcppages_bulk()

On Tue, Aug 31, 2021 at 06:51:23PM +0200, Vlastimil Babka wrote:
> Does the kernel have commit 88e8ac11d2ea3 backported? If not, and there were
> memory hotplug operations happening, the infinite loop could happen. If that
> commit was not backported, and instead 5c3ad2eb7104 was backported, possibly
> there are more scenarios outside hotplug that can cause trouble.

Yes, it appears that 5.8.18 contains the 88e8ac11d2ea3 backport (commit ID
5b21a116b1365 in linux-5.8.y).

Thanks,
Sultan