linux-kernel - Re: [PATCH] swap: fix set_blocksize race during swapon/swapoff

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Message-Id: <20131011115542.a81a9215d9b876706ec58a72@linux-foundation.org>
Date:	Fri, 11 Oct 2013 11:55:42 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Weijie Yang <weijie.yang.kh@...il.com>,
	Bob Liu <bob.liu@...cle.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Shaohua Li <shli@...ionio.com>,
	Minchan Kim <minchan@...nel.org>
Subject: Re: [PATCH] swap: fix set_blocksize race during swapon/swapoff

On Fri, 11 Oct 2013 11:54:22 +0200 Krzysztof Kozlowski <k.kozlowski@...sung.com> wrote:

> Swapoff used old_block_size from swap_info which could be overwritten by
> concurrent swapon.

Better changelogs, please.  What were the user-visible effects of the
bug, and how is it triggered?
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