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[Xen-users] xvda I/O errors in linux 3.1 under XCP 1.0

Good day.

I'm getting this error:

[101017.440858] blkfront: barrier: empty write xvda op failed
[101017.440862] blkfront: xvda: barrier or flush: disabled
[101017.463438] end_request: I/O error, dev xvda, sector 3676376
[101017.463452] end_request: I/O error, dev xvda, sector 3676376
[101017.463459] Buffer I/O error on device xvda1, logical block 459291
[101017.463464] lost page write due to I/O error on xvda1

It happens in every linux 3.1 rc since rc2 during boot (may be in
3.1-rc1 - but it crash at start). Linux 3.0 boots fine. This is not
hardware or storage error: only Linux 3.1 cause this.

Did some one saw this?  What the reason can be behind this? (I'm not
sure but this looks like announcing wrong size of block device, so ext3
failing to change it journal).

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