A correction: It doesn't seem to be related with LVM. Without it the same thing happens. We also tried different filesystems (JFS and EXT3), it makes no difference.
So its not related with LVM but the problem persists. ** Summary changed: - Xen + LVM + Xen IOwait problem ** Description changed: Binary package hint: xen-image-xen0-2.6.17-5-server-xen0 Same thing happens on debian (xen-linux-system-2.6.17-2-xen-686). We used the xen0-2.6.17-5-server kernel with the xen- hypervisor-3.0.3-pae-i386 (3.0.3-rc2) and the generic version with non- pae hypervisor. The problem does not occur with the Ubuntu kernels in main (non-xen). - The problem is that during a lot of disk i/o to a LVM partition, the - IOwait goes to 100% and gradually the load goes higher and higher until - the system is unusable. + The problem is that during a lot of disk i/o, the IOwait goes to 100% + and gradually the load goes higher and higher until the system is + unusable. We tested on different hardware configurations (two different mainboards (intel and asus), different harddisks (maxtor and western digital) and cpu's (celeron and pentium4). We have also tried removing all auxilorary hardware (ethernet controller, e.g.), turning off hyperthreading etc. with no effect. -- Xen IOwait problem https://launchpad.net/bugs/65505 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
