From: Jamie Lokier <jamie@shareable.org>
To: jim owens <jowens@hp.com>, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 0/4] Fiemap, an extent mapping ioctl - round 2
Date: Mon, 7 Jul 2008 17:53:54 +0100 [thread overview]
Message-ID: <20080707165354.GA7707@shareable.org> (raw)
In-Reply-To: <20080707074021.GM29319@disturbed>
Dave Chinner wrote:
> Like:
>
> # xfs_freeze -f <mntpt>
> # xfs_bmap -vvp <file>
> # <do something nasty with direct block access>
> # xfs_freeze -u <mntpt>
^^^ Oh, exactly the sort of thing which led to this quote from Andreas
Dilger on why FIEMAP is *not* suitable for this, on generic filesystems :-)
"EEEEEK [...] Directly writing underneath a filesystem is major
bad news and will likely corrupt the filesystem because [page
cache reasons]."
Besides, if you're using the currently-XFS-specific freeze capability,
a simple fsync() before the xfs_bmap, inside the freeze, will be
sufficient won't it?
-- Jamie
next prev parent reply other threads:[~2008-07-07 16:53 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-25 22:18 [PATCH 0/4] Fiemap, an extent mapping ioctl - round 2 Mark Fasheh
2008-06-26 3:03 ` Andreas Dilger
2008-06-26 9:36 ` Jamie Lokier
2008-06-26 10:24 ` Andreas Dilger
2008-06-26 11:37 ` Anton Altaparmakov
2008-06-26 12:19 ` Jamie Lokier
2008-06-26 13:16 ` Dave Chinner
2008-06-26 13:27 ` Jamie Lokier
2008-06-26 13:48 ` Eric Sandeen
2008-06-26 14:16 ` Jamie Lokier
2008-06-26 16:56 ` Andreas Dilger
2008-06-29 19:12 ` Anton Altaparmakov
2008-06-29 21:45 ` Dave Chinner
2008-06-30 22:57 ` Jamie Lokier
2008-06-30 23:07 ` Mark Fasheh
2008-07-01 2:01 ` Brad Boyer
2008-07-02 6:38 ` Andreas Dilger
2008-07-02 6:33 ` Andreas Dilger
2008-07-02 14:26 ` Jamie Lokier
2008-06-26 17:17 ` Andreas Dilger
2008-06-26 14:03 ` Eric Sandeen
2008-06-27 1:41 ` Dave Chinner
2008-06-27 9:41 ` Jamie Lokier
2008-06-27 10:01 ` Dave Chinner
2008-06-27 10:32 ` Jamie Lokier
2008-06-27 22:48 ` Andreas Dilger
2008-06-28 4:21 ` Eric Sandeen
2008-07-02 6:26 ` Andreas Dilger
2008-07-02 14:28 ` Jamie Lokier
2008-07-02 21:20 ` Mark Fasheh
2008-07-03 14:45 ` Jamie Lokier
2008-06-26 14:04 ` Dave Kleikamp
2008-06-26 14:15 ` Eric Sandeen
2008-06-26 14:27 ` Dave Kleikamp
2008-07-02 23:48 ` jim owens
2008-07-03 11:17 ` Dave Chinner
2008-07-03 12:11 ` jim owens
2008-07-03 22:51 ` Dave Chinner
2008-07-04 8:31 ` Andreas Dilger
2008-07-04 12:13 ` Jamie Lokier
2008-07-07 7:40 ` Dave Chinner
2008-07-07 16:53 ` Jamie Lokier [this message]
2008-07-07 22:51 ` Dave Chinner
2008-07-07 21:16 ` jim owens
2008-07-08 3:01 ` Dave Chinner
2008-07-07 22:02 ` jim owens
2008-07-09 2:03 ` Jamie Lokier
2008-07-03 12:21 ` jim owens
2008-07-03 12:42 ` Andi Kleen
2008-07-04 20:32 ` Anton Altaparmakov
2008-07-05 10:49 ` Jamie Lokier
2008-07-05 21:44 ` Anton Altaparmakov
2008-07-07 23:01 ` jim owens
2008-07-08 1:51 ` Dave Chinner
2008-07-08 13:02 ` jim owens
2008-07-08 14:03 ` jim owens
2008-07-08 14:39 ` jim owens
2008-07-08 14:30 ` Theodore Tso
2008-07-09 1:50 ` Jamie Lokier
2008-06-26 17:01 ` Andreas Dilger
2008-07-03 14:37 ` jim owens
2008-07-03 15:17 ` Jamie Lokier
2008-07-04 8:49 ` Andreas Dilger
2008-07-04 11:28 ` Jamie Lokier
2008-07-03 23:00 ` Dave Chinner
2008-07-04 9:00 ` Andreas Dilger
2008-07-07 23:28 ` jim owens
2008-07-09 1:53 ` Jamie Lokier
2008-07-09 15:01 ` jim owens
2008-07-08 0:06 ` jim owens
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