From: Oleg Nesterov <oleg@redhat.com>
To: Dave Jones <davej@redhat.com>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: post 3.5, phantom signals.
Date: Wed, 1 Aug 2012 17:11:34 +0200 [thread overview]
Message-ID: <20120801151134.GA9333@redhat.com> (raw)
In-Reply-To: <20120731191731.GB30493@redhat.com>
On 07/31, Dave Jones wrote:
>
> Since 3.5, I've started noticing weird things happening with signal delivery.
> Things I've seen so far..
>
> - long running tasks SIGINT, even though I wasn't even anywhere near the keyboard.
> - processes running inside screen/tmux disappearing (and taking the whole session with them).
>
> And now, while waiting for a kernel to build I just saw..
>
> /bin/sh: line 1: 3274 Hangup gcc
Currently I have no idea where this change could come from...
Well, not sure this will help... but if you can reproduce this,
may be you can identify the sender of the wrong SIGHUP at least.
cd /sys/kernel/debug/tracing/
echo "sig==1" >> events/signal/signal_generate/filter
echo 1 >> options/stacktrace
echo 1 >> events/signal/signal_generate/enable
cat trace_pipe > SIGHUP_TRACE
and then rebuild the kernel.
Oleg.
next prev parent reply other threads:[~2012-08-01 15:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-31 19:17 post 3.5, phantom signals Dave Jones
2012-07-31 20:10 ` Linus Torvalds
2012-08-01 15:11 ` Oleg Nesterov [this message]
2012-08-01 15:50 ` Dave Jones
2012-08-02 0:57 ` Frank Ch. Eigler
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