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From: Nicholas Miell <nmiell@comcast.net>
To: Davide Libenzi <davidel@xmailserver.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Linux Kernel list <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH/RFC] signal races/bugs, losing TIF_SIGPENDING and other woes
Date: Tue, 05 Jun 2007 17:15:36 -0700	[thread overview]
Message-ID: <1181088936.2788.10.camel@entropy> (raw)
In-Reply-To: <Pine.LNX.4.64.0706051710140.23673@alien.or.mcafeemobile.com>

On Tue, 2007-06-05 at 17:11 -0700, Davide Libenzi wrote:
> On Tue, 5 Jun 2007, Nicholas Miell wrote:
> 
> > Yes, that's certainly wrong, but that's an implementation issue. I was
> > more concerned about the design of the API.
> > 
> > Naively, I would expect a reads on a signalfd to return either process
> > signals or thread signals targeted towards the thread doing the read.
> > 
> > What it actually does (delivering process signals or thread signals
> > targeted towards the thread that created the signalfd) is weird.
> > 
> > For one, it means you can't create a single signalfd, stick it in an
> > epoll set, and then wait on that set from multiple threads.
> 
> In your box threads do share the sighand, don't they? :)
> 

I have no idea what you're trying to say, but it doesn't appear to
address the issue I raise.

-- 
Nicholas Miell <nmiell@comcast.net>


  reply	other threads:[~2007-06-06  0:15 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-05  1:25 [PATCH/RFC] signal races/bugs, losing TIF_SIGPENDING and other woes Benjamin Herrenschmidt
2007-06-05  1:44 ` Linus Torvalds
2007-06-05  2:10   ` Benjamin Herrenschmidt
2007-06-05  2:38     ` Davide Libenzi
2007-06-05  3:22       ` Benjamin Herrenschmidt
2007-06-05  6:09         ` Nicholas Miell
2007-06-05  7:27           ` Benjamin Herrenschmidt
2007-06-05 23:51             ` Nicholas Miell
2007-06-06  0:03               ` Benjamin Herrenschmidt
2007-06-06  0:11               ` Davide Libenzi
2007-06-06  0:15                 ` Nicholas Miell [this message]
2007-06-06  0:37                   ` Davide Libenzi
2007-06-06  0:58                     ` signalfd API issues (was Re: [PATCH/RFC] signal races/bugs, losing TIF_SIGPENDING and other woes) Nicholas Miell
2007-06-06  2:50                       ` Benjamin Herrenschmidt
2007-06-06  3:29                         ` Davide Libenzi
2007-06-06  3:37                           ` Linus Torvalds
2007-06-06  4:08                             ` Nicholas Miell
2007-06-06  4:18                               ` Benjamin Herrenschmidt
2007-06-06  4:35                             ` Davide Libenzi
2007-06-06  6:47                             ` Benjamin Herrenschmidt
2007-06-06 22:36                               ` Davide Libenzi
2007-06-06  3:52                           ` Benjamin Herrenschmidt
2007-06-06 12:52                         ` Jeff Dike
2007-06-06 22:43                           ` Paul Mackerras
2007-06-07  2:20                             ` Jeff Dike
2007-06-07  3:29                               ` Benjamin Herrenschmidt
2007-06-07 13:59                                 ` Jeff Dike
2007-06-07  3:21                           ` Benjamin Herrenschmidt
2007-06-05 15:52     ` [PATCH/RFC] signal races/bugs, losing TIF_SIGPENDING and other woes Davide Libenzi
2007-06-05 22:15       ` Benjamin Herrenschmidt
2007-06-05 22:50         ` Davide Libenzi
2007-06-05 22:59           ` Benjamin Herrenschmidt
2007-06-06  0:11             ` Davide Libenzi

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