Hi,
My host is logging these errors about once a week, which lead to guest (qemu KVM on libvirt) been killed. Host CPU is at all times very low. Something related to ext4 and "performance will be poor"?
Thanks
kernel-2.6.32-279.11.1.el6.x86_64 libvirt-0.9.10-21.el6_3.5.x86_64 sanlock-2.3-1.el6.x86_64
Nov 18 20:42:51 appserver01 kernel: EXT4-fs (dm-0): Unaligned AIO/DIO on inode 48 by sanlock; performance will be poor. Nov 19 20:42:53 appserver01 kernel: EXT4-fs (dm-0): Unaligned AIO/DIO on inode 48 by sanlock; performance will be poor. Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: s1 delta_renew reread mismatch Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: leader1 delta_renew_last error 0 lockspace __LIBVIRT__DISKS__ host_id 1 Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: leader2 path /var/lib/libvirt/sanlock/__LIBVIRT__DISKS__ offset 0 Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: leader3 m 12212010 v 30002 ss 512 nh 0 mh 1 oi 1 og 14 lv 0 Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: leader4 sn __LIBVIRT__DISKS__ rn 18fefd6b-45fe-4d2b-8774-7c890826d722.appserver0 ts 1040519 cs b1df2fa4 Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: leader1 delta_renew_read error 0 lockspace __LIBVIRT__DISKS__ host_id 1 Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: leader2 path /var/lib/libvirt/sanlock/__LIBVIRT__DISKS__ offset 0 Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: leader3 m 12212010 v 30002 ss 512 nh 0 mh 1 oi 1 og 14 lv 0 Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: leader4 sn __LIBVIRT__DISKS__ rn 18fefd6b-45fe-4d2b-8774-7c890826d722.appserver0 ts 1040499 cs a4181d8a Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [18880]: s1 renewal error -261 delta_length 0 last_success 1040519 Nov 19 21:38:19 appserver01 sanlock[17941]: 2012-11-19 21:38:19+0100 1040540 [17941]: s1 check_our_lease corrupt -261