From: Eric Sandeen <sandeen@redhat.com>
To: Vitez Gabor <vitezg@niif.hu>
Cc: linux-ext4@vger.kernel.org
Subject: Re: support freeze operation like xfs_freeze
Date: Thu, 25 Jan 2007 13:40:58 -0600 [thread overview]
Message-ID: <45B907CA.70309@redhat.com> (raw)
In-Reply-To: <20070125172818.GA25037@swszl.szkp.uni-miskolc.hu>
Vitez Gabor wrote:
> Hi,
>
> It would be really great if ext4 supported an xfs_freeze like operation.
> On xfs it spared me a lot of headaches when I was playing with unstable
> kernel features.
>
> thanks
> Gabor
>
Right now ext3 and ext4 -can- be frozen, but only via devicemapper,
because the call to freeze_bdev is only exposed via
<dm ioctl>
dev_suspend
do_suspend
dm_suspend
lock_fs
freeze_bdev <-- generic, exported kernel function
on an lvm volume. So, I think ext[34] are perfectly capable of being
frozen, there's just no generic userspace utility to point at a generic
block device to do that freezing. xfs's collection of ioctls to do this
directly got grandfathered in, I guess. :)
-Eric
next prev parent reply other threads:[~2007-01-25 19:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-25 17:28 support freeze operation like xfs_freeze Vitez Gabor
2007-01-25 17:59 ` coly
2007-01-25 19:40 ` Eric Sandeen [this message]
2007-01-26 21:22 ` Theodore Tso
2007-01-26 22:23 ` Eric Sandeen
2007-01-27 1:10 ` Theodore Tso
2007-01-29 9:57 ` Vitez Gabor
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=45B907CA.70309@redhat.com \
--to=sandeen@redhat.com \
--cc=linux-ext4@vger.kernel.org \
--cc=vitezg@niif.hu \
/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.