From: Andrew Morton <akpm@linux-foundation.org>
To: Vitaly Wool <vitalywool@gmail.com>
Cc: Linux-MM <linux-mm@kvack.org>,
linux-kernel@vger.kernel.org,
Markus Linnala <markus.linnala@gmail.com>,
stable@kernel.org, Dan Streetman <ddstreet@ieee.org>,
Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH] z3fold: claim page in the beginning of free
Date: Thu, 26 Sep 2019 15:48:34 -0700 [thread overview]
Message-ID: <20190926154834.132f40363f5805a7a5cb347a@linux-foundation.org> (raw)
In-Reply-To: <20190926104844.4f0c6efa1366b8f5741eaba9@gmail.com>
On Thu, 26 Sep 2019 10:48:44 +0200 Vitaly Wool <vitalywool@gmail.com> wrote:
> There's a really hard to reproduce race in z3fold between
> z3fold_free() and z3fold_reclaim_page(). z3fold_reclaim_page()
> can claim the page after z3fold_free() has checked if the page
> was claimed and z3fold_free() will then schedule this page for
> compaction which may in turn lead to random page faults (since
> that page would have been reclaimed by then). Fix that by
> claiming page in the beginning of z3fold_free().
>
I take it from the email headers that a
Cc: <stable@vger.kernel.org>
was intended?
prev parent reply other threads:[~2019-09-26 22:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-26 8:48 [PATCH] z3fold: claim page in the beginning of free Vitaly Wool
2019-09-26 22:48 ` Andrew Morton [this message]
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