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<p>Hi,</p>
<p>I've successfully compiled Lustre after the <br>
</p>
<p>'LU-12457 kernel: RHEL 7.7 server support' change <br>
</p>
<p>but when I try to create an MGS with LDISKFS backend <br>
</p>
<p>on RHEL 7.7 I get CPU soft lockup:</p>
<p> kernel:NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s!
[mkfs.lustre:31220]</p>
<p><br>
</p>
<p>Looked into logs for more details:<br>
</p>
Sep 6 10:41:00 mgs1 kernel: Call Trace:<br>
<p>Sep 6 10:41:00 mgs1 kernel: [<ffffffff9bd73365>]
queued_spin_lock_slowpath+0xb/0xf<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9bd81ad0>]
_raw_spin_lock+0x20/0x30<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b865e2e>]
igrab+0x1e/0x60<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffffc06bd88b>]
ldiskfs_quota_off+0x3b/0x130 [ldiskfs]<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffffc06c091d>]
ldiskfs_put_super+0x4d/0x400 [ldiskfs]<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b84b13d>]
generic_shutdown_super+0x6d/0x100<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b84b5b7>]
kill_block_super+0x27/0x70<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b84b91e>]
deactivate_locked_super+0x4e/0x70<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b84c0a6>]
deactivate_super+0x46/0x60<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b86abff>]
cleanup_mnt+0x3f/0x80<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b86ac92>]
__cleanup_mnt+0x12/0x20<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b6c1c0b>]
task_work_run+0xbb/0xe0<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9b62cc65>]
do_notify_resume+0xa5/0xc0<br>
Sep 6 10:41:00 mgs1 kernel: [<ffffffff9bd8c23b>]
int_signal+0x12/0x17<br>
Sep 6 10:41:00 mgs1 kernel: Code: 47 fe ff ff 66 2e 0f 1f 84 00
00 00 00 00 0f 1f 44 00 00 55 48 89 e5 66 90 b9 01 00 00 00 8b 17
85 d2 74 0d 83 fa 03 74 08 f3 90 <8b> 17 85 d2 75 f3 89 d0
f0 0f b1 0f 39 c2 75 e3 5d 66 90 c3 0f <br>
</p>
<p><br>
</p>
<p>Has anyone else also experienced this issue?</p>
<p>Is there a way to make this work?<br>
</p>
<p><br>
</p>
<p>Thanks,<br>
</p>
<pre class="moz-signature" cols="72">--
Tamás Kazinczy</pre>
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