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, Oleksiy.Avramchenko@sony.com
Subject: Re: [PATCH] z3fold: limit use of stale list for allocation
Date: Fri, 16 Feb 2018 16:28:09 -0800 [thread overview]
Message-ID: <20180216162809.30b2278f0cacefa66c95c1aa@linux-foundation.org> (raw)
In-Reply-To: <47ab51e7-e9c1-d30e-ab17-f734dbc3abce@gmail.com>
On Sat, 10 Feb 2018 12:02:52 +0100 Vitaly Wool <vitalywool@gmail.com> wrote:
> Currently if z3fold couldn't find an unbuddied page it would first
> try to pull a page off the stale list. The problem with this
> approach is that we can't 100% guarantee that the page is not
> processed by the workqueue thread at the same time unless we run
> cancel_work_sync() on it, which we can't do if we're in an atomic
> context. So let's just limit stale list usage to non-atomic
> contexts only.
This smells like a bugfix. What are the end-user visible effects of
the bug?
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next prev parent reply other threads:[~2018-02-17 0:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-10 11:02 Vitaly Wool
2018-02-17 0:28 ` Andrew Morton [this message]
2018-03-04 20:18 ` Vitaly Wool
-- strict thread matches above, loose matches on Subject: below --
2018-02-10 8:57 Vitaly Vul
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