<div dir="ltr"><div>Seeing a lot of this in the syslog<br><br>Aug 17 12:05:28 vna kernel: [252707.346162] INFO: task zvol:1244 blocked for more than 120 seconds.<br>Aug 17 12:05:28 vna kernel: [252707.346191] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.<br>Aug 17 12:05:28 vna kernel: [252707.346215] zvol D ffff88101e6d3640 0 1244 2 0x00000000<br>Aug 17 12:05:28 vna kernel: [252707.346219] ffff88080ec6fb98 0000000000000046 ffff88080f3244a0 ffff88080ec6ffd8<br>Aug 17 12:05:28 vna kernel: [252707.346223] ffff88080ec6ffd8 ffff88080ec6ffd8 ffff8810132bd010 ffff88080f3244a0<br>Aug 17 12:05:28 vna kernel: [252707.346226] 0000000000000001 ffff88100ef20b68 ffff88100ef20a20 ffff88100ef20b70<br>Aug 17 12:05:28 vna kernel: [252707.346230] Call Trace:<br>Aug 17 12:05:28 vna kernel: [252707.346237] [<ffffffff8163cc79>] schedule+0x29/0x70<br>Aug 17 12:05:28 vna kernel: [252707.346261] [<ffffffffa0126965>] cv_wait_common+0x115/0x130 [spl]<br>Aug 17 12:05:28 vna kernel: [252707.346264] [<ffffffff81095240>] ? wake_up_bit+0x40/0x40<br>Aug 17 12:05:28 vna kernel: [252707.346271] [<ffffffffa01269d5>] __cv_wait+0x15/0x20 [spl]<br>Aug 17 12:05:28 vna kernel: [252707.346310] [<ffffffffa0233c73>] txg_wait_open+0x83/0xd0 [zfs]<br>Aug 17 12:05:28 vna kernel: [252707.346329] [<ffffffffa01ef1f0>] dmu_tx_wait+0x380/0x390 [zfs]<br>Aug 17 12:05:28 vna kernel: [252707.346346] [<ffffffffa01ef29a>] dmu_tx_assign+0x9a/0x520 [zfs]<br>Aug 17 12:05:28 vna kernel: [252707.346372] [<ffffffffa0287df5>] zvol_write+0xf5/0x450 [zfs]<br>Aug 17 12:05:28 vna kernel: [252707.346378] [<ffffffffa0122fc6>] taskq_thread+0x1f6/0x440 [spl]<br>Aug 17 12:05:28 vna kernel: [252707.346382] [<ffffffff810a61b0>] ? try_to_wake_up+0x290/0x290<br>Aug 17 12:05:28 vna kernel: [252707.346388] [<ffffffffa0122dd0>] ? taskq_dispatch+0x170/0x170 [spl]<br>Aug 17 12:05:28 vna kernel: [252707.346391] [<ffffffff810948d0>] kthread+0xc0/0xd0<br>Aug 17 12:05:28 vna kernel: [252707.346393] [<ffffffff81094810>] ? kthread_create_on_node+0x120/0x120<br>Aug 17 12:05:28 vna kernel: [252707.346396] [<ffffffff81646518>] ret_from_fork+0x58/0x90<br>Aug 17 12:05:28 vna kernel: [252707.346398] [<ffffffff81094810>] ? kthread_create_on_node+0x120/0x120<br>Aug 17 12:05:28 vna kernel: [252707.346465] INFO: task kvm:226112 blocked for more than 120 seconds.<br>Aug 17 12:05:28 vna kernel: [252707.346485] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.<br>Aug 17 12:05:28 vna kernel: [252707.346509] kvm D ffff88101e673640 0 226112 1 0x00000000<br>Aug 17 12:05:28 vna kernel: [252707.346511] ffff880b94a13d48 0000000000000086 ffff88047479c4a0 ffff880b94a13fd8<br>Aug 17 12:05:28 vna kernel: [252707.346515] ffff880b94a13fd8 ffff880b94a13fd8 ffff8810132badc0 ffff88047479c4a0<br>Aug 17 12:05:28 vna kernel: [252707.346518] ffff880b94a13d48 ffff88047479c4a0 ffff88101e673f08 7fffffffffffffff<br><br></div><div>kernel is 3.10.0-11-pve<br></div><div><br></div>Perhaps I should take it to the zfsinlinux list?<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 17 August 2015 at 14:14, Lindsay Mathieson <span dir="ltr"><<a href="mailto:lindsay.mathieson@gmail.com" target="_blank">lindsay.mathieson@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><span class=""><div class="gmail_extra"><br><div class="gmail_quote">On 17 August 2015 at 14:00, Dietmar Maurer <span dir="ltr"><<a href="mailto:dietmar@proxmox.com" target="_blank">dietmar@proxmox.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Please can you post exact steps to reproduce the behavior?</blockquote></div><br></div></span><div class="gmail_extra">Trouble is, I'm not sure what causes it to happen. This time round it seemed to coincide with cloning a VM to the data pool, so maybe it was the stress?<br><br></div><div class="gmail_extra">smartctl doesn't reveal any problems in the disks.<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">Any suggestions for logging I should check?<span class="HOEnZb"><font color="#888888"><br></font></span></div><span class="HOEnZb"><font color="#888888"><div class="gmail_extra"><br clear="all"><br>-- <br><div>Lindsay</div>
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</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature">Lindsay</div>
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