Lev Serebryakov
Mon, 23 Jun 2008 08:34:35 -0700
Hello, John. You wrote 23 июня 2008 г., 18:47:33: > On Monday 16 June 2008 07:21:15 am Lev Serebryakov wrote: >> Lev Serebryakov wrote: >> > It seems to be ATA/SATA or UFS2 problem: now I have computer in state, >> > when 4 iozone processes are hanged in "Disk wait" state, and I can not >> > "cd" to filesystem, which is tested by "iozone". >> > But I can create processes, work on system, etc., if I don't touch this >> > filesystem. >> >> I can reproduce it, creating gmirror on 5 disks (yes, not very useful >> configuration, but I've started from non-base-system RAID5 and need to >> exclude it), FS with 64Kb blocks, and 4 threads of iozone with mixed >> workload (-i 8 -+p 70). >> >> All 5 disks are ICH9DO-based, SATA-II WD5000AAKS HDDs. > Try getting the 'ps' output from ddb. Also, get a crash dump if you can. It was tracked douwn to known deadlock in buffer allocator when buffer map is fragmented (thnx to [EMAIL PROTECTED]). Workaround is known: don't use FSes with 16Kb and 64Kb blocks on same system in one time. 16/32 mixture works well :)
-- // Black Lion AKA Lev Serebryakov <[EMAIL PROTECTED]> _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"