Hi - I'm not getting any joy with Fedora's bugzilla. Has anyone seen problems like this with Fedora 12? Our systems have recently been getting stuck while rsyncing data onto an MD device: https://bugzilla.redhat.com/show_bug.cgi?id=578549 INFO: task kthreadd:2 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kthreadd D 0000000000000002 0 2 0 0x00000000 ffff88007dbfd4c0 0000000000000046 0000000000000000 0000000a00000000 ffff880000000001 ffff880079f9b800 ffff88007dbfdfd8 ffff88007dbfdfd8 ffff88007dbf1b38 000000000000f980 0000000000015740 ffff88007dbf1b38 Call Trace: [<ffffffff8107c30d>] ? ktime_get_ts+0x85/0x8e [<ffffffff810d604d>] ? sync_page+0x0/0x4a [<ffffffff810d604d>] ? sync_page+0x0/0x4a [<ffffffff814546f5>] io_schedule+0x43/0x5d [<ffffffff810d6093>] sync_page+0x46/0x4a [<ffffffff81454c48>] __wait_on_bit+0x48/0x7b ... Several processes end up stuck in a D state: USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 2 0.0 0.0 0 0 ? D Mar31 0:07 [kthreadd] root 14 0.0 0.0 0 0 ? D Mar31 9:38 [async/mgr] root 17 0.0 0.0 0 0 ? D Mar31 0:00 [bdi- default] root 34 0.0 0.0 0 0 ? D Mar31 10:06 [kswapd0] root 5509 0.0 0.3 50732 7900 ? D Apr09 0:03 rsync - raHSx --stats --whole-file --numeric-ids --link- dest=/xback2_back1/YY/20100407-000501 --exclude=/lost+found -- exclude=.mozilla/*/*/Cache/* XX:/XX_data1/data/YY/ /xback2_back1/YY/20100409-000502/ root 17457 0.0 0.2 61920 5756 ? D Apr11 0:00 python /data/soft3/backup/diskbackup/diskbackup.py /data/soft3/backup/diskbackup/main.cfg root 18402 0.0 0.0 0 0 ? D Apr09 0:11 [flush-9:0] root 20259 0.0 0.1 4284 3424 ? DN Apr11 0:00 /usr/sbin/prelink -av -mR -q It only seems to affect our MD systems. The kernel is 2.6.32.10-90.fc12.x86_64. The systems have 3ware 96xx controllers. This kernel does have the issue when there are lots of aio processes. The two affected systems have different file systems: xfs and ext3. Jeremy -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
