From: Arnd Bergmann <arnd@arndb.de>
To: Darren Hart <dvhltc@us.ibm.com>
Cc: "lkml, " <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
Eric Dumazet <eric.dumazet@gmail.com>,
Dinakar Guniguntala <dino@in.ibm.com>,
"Stultz, John" <johnstul@us.ibm.com>
Subject: Re: [PATCH] RFC: futex: make futex_lock_pi interruptible
Date: Thu, 29 Oct 2009 09:39:32 +0100 [thread overview]
Message-ID: <200910290939.32485.arnd@arndb.de> (raw)
In-Reply-To: <4AE63FA3.8040208@us.ibm.com>
On Tuesday 27 October 2009, Darren Hart wrote:
> The following C test case demonstrates how this patch could be used to
> implement interruptible locking. There is an awful lot of debug code and
> some other relics of a hacked together test in there now, but if anyone
> wanted to test the futex changes, this will do the trick.
>
Your test program uses a signal handler to interrupt the mutex. If you
are using a signal handler already to implement a user space mutex_cancel,
why can't you just do a longjmp out of the signal handler rather than
modifying the kernel?
Arnd <><
next prev parent reply other threads:[~2009-10-29 8:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-27 0:26 [PATCH] RFC: futex: make futex_lock_pi interruptible Darren Hart
2009-10-27 0:32 ` Darren Hart
2009-10-29 8:39 ` Arnd Bergmann [this message]
2009-10-30 1:19 ` Darren Hart
2009-10-30 1:45 ` Darren Hart
2009-10-30 9:13 ` Arnd Bergmann
2009-10-30 16:23 ` Darren Hart
2009-10-30 17:39 ` Arnd Bergmann
2009-10-30 17:55 ` Chris Friesen
2009-10-31 0:31 ` Darren Hart
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