On 06/18/2012 01:02 PM, Christian May wrote: > So, I've started on my RHEL6.1 system filesystem I/O against 5 > multipath devices. Each multipath device contains 4 partition - two > of them were mounted and used for fs-I/O. The exerciser was running > for appr. 2 hours without a single path failure message. Then I'v > started block I/O against the other 5 multipath devices. > Pretty soon the first path failure was reported: > Could be a request-queue starvation. As you're using directio any I/O requests from the checker will be queued onto the request queue. If the system is fully loaded it might take some time for the checker I/O to be actually submitted; occasionally this might be longer than the I/O timeout of the checker. I would switch to 'tur' checker and retest. (Well, _actually_ I would switch to _SLES_ and retest, but I guess that's beside the point :-) Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@xxxxxxx +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg) -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
