Regression- XFS won't mount on partitioned md array

From: David Greaves
Date: Fri May 16 2008 - 13:12:00 EST

I just attempted a kernel upgrade from to and it no longer
mounts my xfs filesystem.

I bisected it to around
[XFS] Move platform specific mount option parse out of core XFS code

I have a RAID5 array with partitions:

Partition Table for /dev/md_d0

First Last
# Type Sector Sector Offset Length Filesystem Type (ID) Flag
-- ------- ----------- ----------- ------ ----------- -------------------- ----
1 Primary 0 2500288279 4 2500288280 Linux (83) None
2 Primary 2500288280 2500483583 0 195304 Non-FS data (DA) None

when I attempt to mount /media:
/dev/md_d0p1 /media xfs rw,nobarrier,noatime,logdev=/dev/md_d0p2,allocsize=512m 0 0

I get:
md_d0: p1 p2
XFS mounting filesystem md_d0p1
attempt to access beyond end of device
md_d0p2: rw=0, want=195311, limit=195304
I/O error in filesystem ("md_d0p1") meta-data dev md_d0p2 block 0x2fae7
("xlog_bread") error 5 buf count 512
XFS: empty log check failed
XFS: log mount/recovery failed: error 5
XFS: log mount failed

A repair:
xfs_repair /dev/md_d0p1 -l /dev/md_d0p2
gives no errors.

Phase 1 - find and verify superblock...
Phase 2 - using external log on /dev/md_d0p2
- zero log...
- scan filesystem freespace and inode maps...
- found root inode chunk


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