when i create raid5 in btrfs ,command like this: ./mkfs.btrfs -d raid5 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm -f WARNING! - Btrfs v0.20-rc1-358-g194aa4a-dirty IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using then no response, there is error in kernel log: Oct 24 21:25:36 host1 kernel: [ 3000.809503] INFO: task mkfs.btrfs:3695 blocked for more than 120 seconds. Oct 24 21:25:36 host1 kernel: [ 3000.809506] "echo 0 > /proc/sys/kernel/hung_task_ timeout_secs" disables this message. Oct 24 21:25:36 host1 kernel: [ 3000.809508] mkfs.btrfs D 0000000000000001 0 3695 3519 0x00000000 Oct 24 21:25:36 host1 kernel: [ 3000.809513] ffff8807f4441c68 0000000000000082 ffffffff8133677d ffff88080e049590 Oct 24 21:25:36 host1 kernel: [ 3000.809518] ffff8807f4441fd8 ffff8807f4441fd8 ffff8807f4441fd8 00000000000139c0 Oct 24 21:25:36 host1 kernel: [ 3000.809522] ffff88080e9ddc00 ffff8808115a8000 ffff88080f7bc000 7fffffffffffffff Oct 24 21:25:36 host1 kernel: [ 3000.809527] Call Trace: Oct 24 21:25:36 host1 kernel: [ 3000.809534] [<ffffffff8133677d>] ? rb_insert_color+0xad/0x150 Oct 24 21:25:36 host1 kernel: [ 3000.809539] [<ffffffff8169d8b9>] schedule+0x29/0x70 Oct 24 21:25:36 host1 kernel: [ 3000.809543] [<ffffffff8169bfd5>] schedule_timeout+0x2a5/0x320 Oct 24 21:25:36 host1 kernel: [ 3000.809547] [<ffffffff8131048c>] ? blk_queue_bio+0x1cc/0x3a0 Oct 24 21:25:36 host1 kernel: [ 3000.809551] [<ffffffff8169d70f>] wait_for_common+0xdf/0x180 Oct 24 21:25:36 host1 kernel: [ 3000.809555] [<ffffffff8108a360>] ? try_to_wake_up+0x200/0x200 Oct 24 21:25:36 host1 kernel: [ 3000.809559] [<ffffffff8169d88d>] wait_for_completion+0x1d/0x20 Oct 24 21:25:36 host1 kernel: [ 3000.809563] [<ffffffff81315c14>] blkdev_issue_discard+0x1b4/0x1c0 Oct 24 21:25:36 host1 kernel: [ 3000.809567] [<ffffffff81316341>] blkdev_ioctl+0x461/0x7a0 Oct 24 21:25:36 host1 kernel: [ 3000.809572] [<ffffffff811beb70>] block_ioctl+0x40/0x50 Oct 24 21:25:36 host1 kernel: [ 3000.809576] [<ffffffff811996fa>] do_vfs_ioctl+0x8a/0x340 Oct 24 21:25:36 host1 kernel: [ 3000.809579] [<ffffffff8118c72a>] ? sys_newfstat+0x2a/0x40 Oct 24 21:25:36 host1 kernel: [ 3000.809583] [<ffffffff81199a41>] sys_ioctl+0x91/0xa0 Oct 24 21:25:36 host1 kernel: [ 3000.809588] [<ffffffff816a7029>] system_call_fastpath+0x16/0x1b -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
