[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 4 Apr 2022 11:28:02 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Zi Yan <ziy@...dia.com>
Cc: Zi Yan <zi.yan@...t.com>, linux-mm@...ck.org,
Matthew Wilcox <willy@...radead.org>,
Michal Hocko <mhocko@...nel.org>,
Naoya Horiguchi <naoya.horiguchi@....com>,
linux-kernel@...r.kernel.org,
Naoya Horiguchi <naoya.horiguchi@...ux.dev>
Subject: Re: [PATCH] mm: migrate: use thp_order instead of HPAGE_PMD_ORDER
for new page allocation.
On Mon, 4 Apr 2022 12:53:25 -0400 Zi Yan <zi.yan@...t.com> wrote:
> From: Zi Yan <ziy@...dia.com>
>
> With folios support, it is possible to have other than HPAGE_PMD_ORDER
> THPs, in the form of folios, in the system. Use thp_order() to correctly
> determine the source page order during migration.
Changelog doesn't describe the end user visible effects of the bug.
And it really should, because
> Link: https://lore.kernel.org/linux-mm/20220404132908.GA785673@u2004/
it fixes a kernel crash!
Powered by blists - more mailing lists