From: "John Z. Bohach" <jzb2@aexorsyst.com>
To: linux-kernel@vger.kernel.org
Cc: "Ulrich Drepper" <drepper@gmail.com>
Subject: Re: __kernel_vsyscall () hangs in SIGCHLD handler
Date: Wed, 26 Sep 2007 11:51:15 -0700 [thread overview]
Message-ID: <200709261151.15967.jzb2@aexorsyst.com> (raw)
In-Reply-To: <a36005b50709261003j923835fu621882c54706d476@mail.gmail.com>
On Wednesday 26 September 2007 10:03:33 Ulrich Drepper wrote:
> On 9/26/07, John Z. Bohach <jzb2@aexorsyst.com> wrote:
> > Is there some reason that syslog() sleeps in __kernel_vsyscall()
> > when invoked from a signal handler?
>
> Only very few functions are allowed to be called from signal
> handlers. This is clearly spelled out in the POSIX spec. Section XSH
> 2.4.3 lists the allowed functions. syslog of course is not on it. -
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> Please read the FAQ at http://www.tux.org/lkml/
Thank you for this information...also thanks to Giacomo who answered me
offline...
--john
next prev parent reply other threads:[~2007-09-26 18:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-26 14:57 John Z. Bohach
2007-09-26 17:03 ` Ulrich Drepper
2007-09-26 18:51 ` John Z. Bohach [this message]
2007-09-26 19:11 ` Mikael Pettersson
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