Re: [PATCH 0/4] I/O Error Handling for ReiserFS v3

[Hans Reiser]

These have received design approval from zam (and thus me), but zam, did 
they receive stress testing by Elena under your guidance?

Hans

Jeffrey Mahoney wrote:

> Hey all -
>
> One of the most common complaints I've heard about ReiserFS is how
> graceless it is in handling critical I/O errors.
>
> ext[23] can handle I/O errors anywhere, with the results being up to the
> system admin to determine: continue, go read only, or panic.
>
> ReiserFS doesn't offer the admin any such choice, instead panicking on
> any I/O error in the journal.
>
> The available options are read only or panic, since ReiserFS does not
> currently support operations without the journal.
>
> In the four messages that follow, you'll find:
> * reiserfs-cleanup-buffer-heads.diff
>        - Cleans up handling of buffer head bitfields - uses
>          the kernel supplied FNS_BUFFER macros instead.
> * reiserfs-cleanup-sb-journal.diff
>        - Cleans up accessing of the journal structure, prefering
>          to create a temporary variable in functions that access
>          the journal structure non-trivially. Should make 0 difference
>          at compile time.
> * reiserfs-io-error-handling.diff
>        - Allows ReiserFS to gracefully handle I/O errors in critical
>          code paths. The admin has the option to go read-only or panic.
>          Since ReiserFS has no option to ignore the use of the journal,
>          the "continue" method is not enabled.
> * reiserfs-write-lock.diff
>        - Fixes two missing reiserfs_write_unlock() calls on error paths
>          that are unrelated to reiserfs-io-error-handling.diff
>
> These patches have seen a lot of testing in the SuSE Linux Enterprise
> Server 9 kernel, and are considered ready for mainline.
>
> They've received approval[1] from the ReiserFS maintainers also.
>
> Andrew - Apologies for the previous format; Please apply.
>
> Thanks.
>
> -Jeff
>
> [1] http://marc.theaimsgroup.com/?l=reiserfs&m=109587254714180
>
> --
> Jeff Mahoney
> SuSE Labs
>  

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