From: Andrew Morton <akpm@linux-foundation.org>
To: Mark Fasheh <mfasheh@suse.com>
Cc: Andreas Dilger <adilger@sun.com>,
Eric Sandeen <esandeen@redhat.com>,
linux-ext4@vger.kernel.org
Subject: Re: [PATCH 0/3] Fiemap, an extent mapping ioctl
Date: Wed, 10 Sep 2008 11:46:12 -0700 [thread overview]
Message-ID: <20080910114612.314978a8.akpm@linux-foundation.org> (raw)
In-Reply-To: <20080910124934.GB4563@wotan.suse.de>
On Wed, 10 Sep 2008 05:49:34 -0700 Mark Fasheh <mfasheh@suse.com> wrote:
> Hello,
>
> The following patches are the latest attempt at implementing a
> fiemap ioctl, which can be used by userspace software to get extent
> information for an inode in an efficient manner.
As these are applicable to all filesystems, Cc:ing only linux-ext4 is
not sufficient. All filesystem developers (at least) need an
opportunity to review and understand these changes.
>
> ...
>
> The fiemap ioctl is an efficient method for userspace to get file
> extent mappings. Instead of block-by-block mapping (such as bmap), fiemap
> returns a list of extents.
>
The above is, afacit, the only offered rationale for the addition of
these new feature. I don't recall seeing anyone complain about bmap()
inefficiency. In fact I rarely hear of anyone using bmap() at all.
This rationale needs expanding, please. A lot.
next prev parent reply other threads:[~2008-09-10 18:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-25 20:22 FIEMAP patches Andreas Dilger
2008-08-26 6:22 ` Mark Fasheh
2008-08-26 6:57 ` Andreas Dilger
2008-09-10 12:40 ` Mark Fasheh
2008-09-10 12:49 ` [PATCH 0/3] Fiemap, an extent mapping ioctl Mark Fasheh
2008-09-10 13:47 ` Christoph Hellwig
2008-09-10 14:07 ` Theodore Tso
2008-09-10 14:11 ` Christoph Hellwig
2008-09-10 20:33 ` Andreas Dilger
2008-09-10 16:10 ` Mark Fasheh
2008-09-10 16:20 ` Christoph Hellwig
2008-09-10 18:46 ` Andrew Morton [this message]
2008-09-10 19:46 ` Andreas Dilger
2008-09-10 12:49 ` [PATCH 1/3] vfs: vfs-level fiemap interface Mark Fasheh
2008-09-10 12:50 ` [PATCH 2/3] generic block based fiemap implementation Mark Fasheh
2008-09-10 12:50 ` [PATCH 3/3] ocfs2: fiemap support Mark Fasheh
2008-09-10 12:50 ` [Ocfs2-devel] " Mark Fasheh
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080910114612.314978a8.akpm@linux-foundation.org \
--to=akpm@linux-foundation.org \
--cc=adilger@sun.com \
--cc=esandeen@redhat.com \
--cc=linux-ext4@vger.kernel.org \
--cc=mfasheh@suse.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.