netwiz
2010-Apr-26 20:05 UTC
[Xen-devel] xen DomU image on RAID5 + XFS causes issues with tap:aio
Hi all, Firstly, I''m not subscribed to this list so please CC me into replies. Upon bashing my head against a wall trying to get Xen working on my new hardware I came across an interesting discovery. Every install using virt-install was failing and I could only use the file: access method for my DomUs. Every time I tries to use tap:aio the guest would error on boot saying it couldn''t find the root partition. My system is as follows: OS: CentOS 5.4 Xen: 3.0.3-94.el5_4.3 / = 2 x 80Gb HDDs, dmraid1, ext3 /mnt/raid = 3 x 1Tb HDDs, dmraid5, xfs On whim, I moved the DomU images from /mnt/raid/vm-images to /vm-images and instantly tap:aio worked again. This brings me to my question: Why would tap:aio fail when the images are on an XFS/RAID5 filesystem but work correctly when on a RAID1/ext3 filesystem? To me, this seems like a bug. -- Steven Haigh http://www.crc.id.au _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Steven Haigh
2010-Apr-26 20:07 UTC
[Xen-devel] xen DomU image on RAID5 + XFS causes issues with tap:aio
Hi all, Firstly, I''m not subscribed to this list so please CC me into replies. Upon bashing my head against a wall trying to get Xen working on my new hardware I came across an interesting discovery. Every install using virt-install was failing and I could only use the file: access method for my DomUs. Every time I tries to use tap:aio the guest would error on boot saying it couldn''t find the root partition. My system is as follows: OS: CentOS 5.4 Xen: 3.0.3-94.el5_4.3 / = 2 x 80Gb HDDs, dmraid1, ext3 /mnt/raid = 3 x 1Tb HDDs, dmraid5, xfs On whim, I moved the DomU images from /mnt/raid/vm-images to /vm-images and instantly tap:aio worked again. This brings me to my question: Why would tap:aio fail when the images are on an XFS/RAID5 filesystem but work correctly when on a RAID1/ext3 filesystem? To me, this seems like a bug. -- Steven Haigh Email: netwiz@crc.id.au Web: http://www.crc.id.au Phone: (03) 9001 6090 - 0412 935 897 Fax: (03) 8338 0299 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel