On Wed, Oct 16, 2013 at 08:12:00AM +0800, Roy Zhang wrote: > Hi Dave, > I performance a ssd and hdd by flashcache. The info as below. > kernel version 2.6.32.220 So you're using out of tree modules in the IO path, on a custom Centos 6.3 kernel and you are getting random hangs waiting for IO completion. FWIW, 15,000 lines of log files is not the information I asked for, but this: [1535047.183083] MEMBlaze Hardware IO Request Irresponsible indicates that you are using some kind of PCIe flash hardware from a chinese startup that doesn't have in-kernel drivers or english documentation. There's no way we can really help you diagnose IO stack problems given these conditions. FWIW, your logs indicate that something is going wrong in your IO stack, not with XFS. XFS is triggering the hung task timer waiting for IO completion, and only after many, many reboots as a result of these hangs you see a log corruption when trying to mount the filesystem. So - look to flashcache or your hardware as the source of your problem... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
