Re: BUG in reiserfs_write_full_page().

[Michael Gaughen <mgaughen@polyserve.com>]

Chris Mason wrote:

>
>Hmmm, the allocation masks are supposed to be set such that writepage
>won't get called.  I'll take a look.  How easy is it to reproduce?  If
>you have any tests cases that can trigger it, please send them along.
>

Actually, the problem may have to do with the common journal_info kept
within the task structure.  Looking at ext3_writepage, they have this to 
say:

        /*
         * We give up here if we're reentered, because it might be
         * for a different filesystem.  One *could* look for a
         * nested transaction opportunity.
         */
        lock_kernel();
        if (ext3_journal_current_handle())
                goto out_fail;

and in the case of out_fail, they do:

        unlock_kernel();
        SetPageDirty(page);
        UnlockPage(page);
        return ret;

So, in the case of reiserfs_write_full_page(), the BUG() is falsely 
triggered
due to a transaction that was started on another filesystem (ext3).  And the
fix would simply be to do something along the lines of ext3...

Thanks,
-Mike