Bug#637234: linux-image-3.0.0-1-686-pae: I/O errors using ext4 under xen

[Bastian Blank <waldi@debian.org>]

found 637234 2.6.32-40
severity 637234 serious
thanks

This is unfixed in -40. Almost all mounts goes wrong now with a 3.0 and
3.1 guest.

| [    6.420630] blkfront: barrier: write xvdb op failed
| [    6.420645] blkfront: xvdb: barrier or flush: disabled
| [    6.421088] end_request: I/O error, dev xvdb, sector 128
| [    6.421099] end_request: I/O error, dev xvdb, sector 128
| [    6.421106] lost page write due to I/O error on xvdb
| [    6.421126] btrfs: 1 errors while writing supers

Bastian

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