Re: Soft lockup issue in Linux 4.1.9

From	Holger Hoffstätte <holger.hoffstaette@googlemail.com>
Newsgroups	linux.kernel
Subject	Re: Soft lockup issue in Linux 4.1.9
Date	2015-10-01 00:40 +0200
Message-ID	<qeycx-1Kc-5@gated-at.bofh.it> (permalink)
References	<qexJw-1cv-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On Wed, 30 Sep 2015 23:59:43 +0200, Olivier Bonvalet wrote:

> for information, I've just upgraded 6 servers from Linux 4.1.8 to Linux
> 4.1.9, and have some random soft lockup. If this can help :

Congratulations! You're not the first one to get hit by this, but
you are probably the first one to get a meaningful stacktrace! \o/

> [  204.478380] Call Trace:
> [  204.478381]  <IRQ> 
> [  204.478385]  [<ffffffff81076121>] ? try_to_del_timer_sync+0x43/0x4d
> [  204.478386]  [<ffffffff810760de>] ? del_timer+0x4d/0x4d
> [  204.478388]  [<ffffffff8107614b>] ? del_timer_sync+0x20/0x3d

Can you try to revert

   [PATCH 4.1 157/159] inet: fix races with reqsk timers

and see how that works for you? I'll do the same on my end. So far the
only thing I ever could gleam was an rcu stall after cpuidle_enter(),
but never anything regarding the timer - though it was definitely
related to NIC activity after idle.

cheers
Holger

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Re: Soft lockup issue in Linux 4.1.9 Holger Hoffstätte   <holger.hoffstaette@googlemail.com> - 2015-10-01 00:40 +0200
  Re: Soft lockup issue in Linux 4.1.9 Andre Tomt <andre@tomt.net> - 2015-10-01 06:50 +0200
    Re: Soft lockup issue in Linux 4.1.9 Holger Hoffstätte   <holger.hoffstaette@googlemail.com> - 2015-10-01 13:00 +0200

csiph-web