Re: 2.5.47 XFS over MD RAID-0 broken

[Stephen Lord <lord@xxxxxxx>]

On Sat, 2002-11-16 at 16:57, Andi Kleen wrote:
> When trying to mount an XFS file system on a RAID-0 MD in 2.5.47
> one gets an oops during log replay.

Andi,

It looks like a zero length bio structure was submitted for I/O.
Question is, how did it get to be zero length.

Actually, this function is probably the culprit:

        xlog_find_verify_cycle

Could you make it print the values of i and bcount before calling 
xlog_bread. The initial values of all the variables fed into this
loop would be good too:

        for (i = start_blk; i < start_blk + nbblks; i += bufblks)  {
                int bcount = min(bufblks, (start_blk + nbblks - i));
 
                if ((error = xlog_bread(log, i, bcount, bp)))
                        goto out; 

This code had some major tweaking for linux, the logic looks ok
to me, but its early in the morning here.


Steve
 
-- 
Stephen  Lord <lord@xxxxxxx>