From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Roland McGrath <roland@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>,
Oleg Nesterov <oleg@tv-sign.ru>
Subject: Re: [BUG] ptraced process waiting on syscall may return kernel internal errnos
Date: Thu, 07 Jun 2007 13:25:24 +1000 [thread overview]
Message-ID: <1181186724.14818.11.camel@localhost.localdomain> (raw)
In-Reply-To: <alpine.LFD.0.98.0706060811470.4205@woody.linux-foundation.org>
On Wed, 2007-06-06 at 08:35 -0700, Linus Torvalds wrote:
>
> So I think that the *right* place to clear TIF_SIGPENDING is actually in
> "get_signal_to_deliver()", because that function is called _only_ by the
> actual per-architecture "I'm going to deliver a signal now".
That was my initial idea but it has an issue with kernel
threads :-( There are in kernel thingies that use signals to a certain
extend and rely on being able to dequeue and/or clear sigpending (or
else they just loop instead of waiting in various loops).
A bit of a can of worms if you ask me.
Ben.
next prev parent reply other threads:[~2007-06-07 3:26 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-06 5:47 [BUG] ptraced process waiting on syscall may return kernel internal errnos Satoru Takeuchi
2007-06-06 10:59 ` Roland McGrath
2007-06-06 15:35 ` Linus Torvalds
2007-06-06 23:07 ` Paul Mackerras
2007-06-07 3:25 ` Benjamin Herrenschmidt [this message]
2007-06-07 3:27 ` Benjamin Herrenschmidt
2007-06-07 11:33 ` Satoru Takeuchi
2007-06-07 15:54 ` Linus Torvalds
2007-06-07 22:24 ` Benjamin Herrenschmidt
2007-06-08 3:18 ` Linus Torvalds
2007-06-08 5:30 ` Benjamin Herrenschmidt
2007-06-11 22:16 ` Benjamin Herrenschmidt
2007-06-08 3:07 ` Satoru Takeuchi
2007-06-13 22:06 ` Roland McGrath
2007-06-07 3:20 ` Benjamin Herrenschmidt
2007-06-13 15:15 ` Oleg Nesterov
2007-06-13 22:36 ` Benjamin Herrenschmidt
2007-06-13 23:01 ` Roland McGrath
2007-06-13 23:18 ` Benjamin Herrenschmidt
2007-06-14 0:02 ` Roland McGrath
2007-06-13 22:53 ` Roland McGrath
2007-06-14 12:26 ` Rafael J. Wysocki
2007-06-14 12:58 ` Oleg Nesterov
2007-06-14 23:35 ` Rafael J. Wysocki
2007-06-15 11:31 ` Oleg Nesterov
2007-06-15 21:48 ` Rafael J. Wysocki
2007-06-15 0:06 ` Benjamin Herrenschmidt
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