From: Andrew Morton <akpm@linux-foundation.org>
To: Zi Yan <ziy@nvidia.com>
Cc: Zi Yan <zi.yan@sent.com>,
linux-mm@kvack.org, Matthew Wilcox <willy@infradead.org>,
Michal Hocko <mhocko@kernel.org>,
Naoya Horiguchi <naoya.horiguchi@nec.com>,
linux-kernel@vger.kernel.org,
Naoya Horiguchi <naoya.horiguchi@linux.dev>
Subject: Re: [PATCH] mm: migrate: use thp_order instead of HPAGE_PMD_ORDER for new page allocation.
Date: Mon, 4 Apr 2022 11:28:02 -0700 [thread overview]
Message-ID: <20220404112802.4c07585b7b7e420342c9b0fb@linux-foundation.org> (raw)
In-Reply-To: <20220404165325.1883267-1-zi.yan@sent.com>
On Mon, 4 Apr 2022 12:53:25 -0400 Zi Yan <zi.yan@sent.com> wrote:
> From: Zi Yan <ziy@nvidia.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!
next prev parent reply other threads:[~2022-04-04 18:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-04 16:53 [PATCH] mm: migrate: use thp_order instead of HPAGE_PMD_ORDER for new page allocation Zi Yan
2022-04-04 18:28 ` Andrew Morton [this message]
2022-04-04 18:37 ` Zi Yan
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