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From: Wengang Wang <wen.gang.wang@oracle.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [PATCH 3/3] ocfs2:freeze-thaw: make it work
Date: Fri, 22 Jan 2010 12:22:14 +0800	[thread overview]
Message-ID: <20100122042214.GA3797@laptop.oracle.com> (raw)
In-Reply-To: <20100120045531.GA3794@laptop.oracle.com>

Hi Sunil,

> >> Though we don't support it, we hope to make the operation succeed.
> >> the big pain is the we have no way to know if a nested freeze is done
> >> againt ocfs2 volume. the second freeze doesn't come to ocfs2, it returns
> >> by vfs(in freeze_bdev()). so we can prevent user to do a nested freeze.
> >>
> >> we can't return error. if we do, the thaw fails with volume still frozen
> >> and no further operation can recover the state.
> >>
> >
> > Taking the superblock lock will prevent this.

could you give me the detail for that?

regards,
wengang.

  parent reply	other threads:[~2010-01-22  4:22 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-09 18:00 [Ocfs2-devel] [PATCH 3/3] ocfs2:freeze-thaw: make it work Wengang Wang
2010-01-16  2:22 ` Sunil Mushran
2010-01-18 13:06   ` Wengang Wang
2010-01-18 16:17     ` Wengang Wang
2010-01-20  0:50     ` Sunil Mushran
2010-01-20  4:55       ` Wengang Wang
2010-01-20 18:22         ` Sunil Mushran
2010-01-21  2:18           ` Wengang Wang
2010-01-21  2:32             ` Sunil Mushran
2010-01-27 18:14           ` Wengang Wang
2010-01-27 20:09             ` Sunil Mushran
2010-01-28 13:00               ` Wengang Wang
2010-01-28 18:08                 ` Sunil Mushran
2010-01-22  4:22         ` Wengang Wang [this message]
2010-01-22 22:35           ` Sunil Mushran

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