Re: [PATCH, RFC] ext4: don't clear orphan list on ro mount with errors

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On Mon, Aug 27, 2012 at 02:27:32PM -0500, Eric Sandeen wrote:
> When we have a filesystem with an orphan inode list *and* in error
> state, things behave differently if:
> 
> 1) e2fsck -p is done prior to mount: e2fsck fixes things and exits
>    happily (barring other significant problems)
> 
> vs.
> 
> 2) mount is done first, then e2fsck -p: due to the orphan inode
>    list removal, more errors are found and e2fsck exits with
>    UNEXPECTED INCONSISTENCY.
> 
> The 2nd case above, on the root filesystem, has the tendency to halt
> the boot process, which is unfortunate.
> 
> The situation can be improved by not clearing the orphan
> inode list when the fs is mounted readonly.
> 
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>

I've applied this commit since I agree with Jan's observation that if
the file system is mounted read-only, we should try to minimize
changes to it if it contains errors.  I have modified the commit
description though:

ext4: don't clear orphan list on ro mount with errors

From: Eric Sandeen <sandeen@xxxxxxxxxx>

If the file system contains errors and it is being mounted read-only,
don't clear the orphan list.  We should minimize changes to the file
system if it is mounted read-only.

Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>

						- Ted
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