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Date: Fri, 11 Oct 2013 11:55:42 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Weijie Yang <weijie.yang.kh@gmail.com>, Bob Liu <bob.liu@oracle.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Shaohua Li <shli@fusionio.com>, Minchan Kim <minchan@kernel.org>
Subject: Re: [PATCH] swap: fix set_blocksize race during swapon/swapoff
Message-Id: <20131011115542.a81a9215d9b876706ec58a72@linux-foundation.org>
In-Reply-To: <1381485262-16792-1-git-send-email-k.kozlowski@samsung.com>
References: <1381485262-16792-1-git-send-email-k.kozlowski@samsung.com>
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On Fri, 11 Oct 2013 11:54:22 +0200 Krzysztof Kozlowski <k.kozlowski@samsung.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?