From: Christoph Hellwig <hch@infradead.org>
To: Qu Wenruo <quwenruo@cn.fujitsu.com>
Cc: linux-btrfs@vger.kernel.org, fstests@vger.kernel.org
Subject: Re: [PATCH] fstests: btrfs: Test fiemap ioctl on completely deduped file
Date: Tue, 10 May 2016 22:25:46 -0700 [thread overview]
Message-ID: <20160511052546.GA7447@infradead.org> (raw)
In-Reply-To: <1462869581-19227-1-git-send-email-quwenruo@cn.fujitsu.com>
On Tue, May 10, 2016 at 04:39:41PM +0800, Qu Wenruo wrote:
> For a completely deduped file, which means all its file extent are
> pointing to one bytenr, if calling fiemap on it, btrfs will cause soft
> hang up or just takes years long.
>
> This bug can be reproduced even without any in-band or out-of-band
> dedupe, normal clone_file_range() call can create such situation.
>
> This test case will detect it.
Why is this a btrfs specific test?
prev parent reply other threads:[~2016-05-11 5:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-10 8:39 [PATCH] fstests: btrfs: Test fiemap ioctl on completely deduped file Qu Wenruo
2016-05-10 10:01 ` Filipe Manana
2016-05-11 2:14 ` Qu Wenruo
2016-05-11 5:46 ` Christoph Hellwig
2016-05-12 0:23 ` Darrick J. Wong
2016-05-12 0:46 ` Qu Wenruo
2016-05-12 1:19 ` Dave Chinner
2016-05-12 1:34 ` Qu Wenruo
2016-05-11 5:25 ` Christoph Hellwig [this message]
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