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    SubjectRe: [PATCH 0/4] jbd: possible filesystem corruption fixes
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    On Fri, 2008-04-18 at 10:09 -0400, Josef Bacik wrote:
    > On Fri, Apr 18, 2008 at 10:00:54PM +0900, Hidehiro Kawai wrote:
    > > Subject: [PATCH 0/4] jbd: possible filesystem corruption fixes
    > >
    > > The current JBD is not sufficient for I/O error handling. It can
    > > cause filesystem corruption. An example scenario:
    > >
    > > 1. fail to write a metadata buffer to block B in the journal
    > > 2. succeed to write the commit record
    > > 3. the system crashes, reboots and mount the filesystem
    > > 4. in the recovery phase, succeed to read data from block B
    > > 5. write back the read data to the filesystem, but it is a stale
    > > metadata
    > > 6. lose some files and directories!
    > >
    > > This scenario is a rare case, but it (temporal I/O error)
    > > can occur. If we abort the journal between 1. and 2., this
    > > tragedy can be avoided.
    > >
    > > This patch set fixes several error handling problems to protect
    > > from filesystem corruption caused by I/O errors. It has been
    > > done only for JBD and ext3 parts.
    > >
    >

    Could you sent Ext4/JBD2 version patches? Thanks!

    > There doesn't seem like much point in taking these patches as Jan is rewriting
    > the ordered mode path and most of these functions will be going away soon.
    > Those patches seem like they will be coming soon and will obsolete these.
    >

    I hope we have a better ordered mode very soon too. Just thought it's
    still valid to fix the current ordered mode for people who uses
    linux-2.6.25 kernel today.

    Mingming
    > Josef
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