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From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To: Namjae Jeon <linkinjeon@gmail.com>
Cc: akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, Namjae Jeon <namjae.jeon@samsung.com>,
        Amit Sahrawat <a.sahrawat@samsung.com>
Subject: Re: [PATCH v2 5/5] fat: permit to return phy block number by fibmap in fallocated region
References: <1384688316-3003-1-git-send-email-linkinjeon@gmail.com>
	<87wqjod97k.fsf@devron.myhome.or.jp>
	<CAKYAXd8NS56AYO-EGs4SM9jVn7AfsQbKznxXP2t7Xf2qDXUo1g@mail.gmail.com>
Date: Fri, 06 Dec 2013 00:48:18 +0900
In-Reply-To: <CAKYAXd8NS56AYO-EGs4SM9jVn7AfsQbKznxXP2t7Xf2qDXUo1g@mail.gmail.com>
	(Namjae Jeon's message of "Thu, 5 Dec 2013 23:20:19 +0900")
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Namjae Jeon <linkinjeon@gmail.com> writes:

>> ->i_mutex doesn't work for swapfile.
> Sorry, Actually, I don't understand why it is related with swapfile.
> Could you elaborate more ?

swapfile.c calls ->bmap to know physical address in swapfile. However,
swapfile.c calls ->bmap under inode->i_mutex.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>