Hello all, i upgraded my servers to 2.6.31.2 a couple of days ago to fix a problem with OCFS2 locking here and there. The kernel is a plain vanilla plus with the addition of linux-vserver patches. An additional module is DRBD 8.3.4 (latest release). I'm having serveral stability problems like the following one: Oct 8 11:16:52 172.30.1.31 [113074.738027] hrtimer: interrupt too slow, forcing clock min delta to 492510645 ns Oct 8 11:16:52 172.30.1.31 [113074.791813] ------------[ cut here ]------------ Oct 8 11:16:52 172.30.1.31 [113074.791813] WARNING: at net/core/skbuff.c:398 skb_release_head_state+0x64/0xc8() Oct 8 11:16:52 172.30.1.31 [113074.791813] Hardware name: Oct 8 11:16:52 172.30.1.31 [113074.791813] Modules linked in: netconsole ocfs2 jbd2 quota_tree ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue configfs crc32c drbd cn loop serio_raw psmouse snd_pcm snd_timer snd soundcore snd_page_alloc virtio_net pcspkr parport_pc parport i2c_piix4 i2c_core button processor evdev ext3 jbd mbcache dm_mirror dm_region_hash dm_log dm_snapshot dm_mod ide_cd_mod cdrom ata_generic ata_piix virtio_blk libata scsi_mod piix ide_pci_generic ide_core virtio_pci virtio_ring virtio floppy thermal fan thermal_sys [last unloaded: netconsole] Oct 8 11:16:52 172.30.1.31 [113074.791813] Pid: 11132, comm: php5-cgi Tainted: G W 2.6.31.2-vserver #1 Oct 8 11:16:52 172.30.1.31 [113074.791813] Call Trace: Oct 8 11:16:52 172.30.1.31 [113074.791813] [] ? skb_release_head_state+0x64/0xc8 Oct 8 11:16:52 172.30.1.31 [113074.791813] [] ? skb_release_head_state+0x64/0xc8 Oct 8 11:16:52 172.30.1.31 [113074.791813] [] ? warn_slowpath_common+0x77/0xa3 (you can find the whole log in attached). The machines looses network connectivity. #uname -a Linux www1 2.6.31.2-vserver #1 SMP PREEMPT Tue Oct 6 17:12:32 UTC 2009 x86_64 GNU/Linux I also have to mention that the server runs on top of a dual socket Xeon E5504 with KVM. I'm attaching the kernel config, the oops (grabbed through netconsole) and the dmesg. Any hint (or any information that i must add) ? Thanks, Massimo