From: David Howells <dhowells@redhat.com>
To: Roland McGrath <roland@redhat.com>
Cc: dhowells@redhat.com, Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH -mm 3/3] proc: make task_sig() lockless
Date: Sat, 10 Apr 2010 09:16:19 +0100 [thread overview]
Message-ID: <9905.1270887379@redhat.com> (raw)
In-Reply-To: <20100409195936.44663BD18@magilla.sf.frob.com>
Roland McGrath <roland@redhat.com> wrote:
> I'm not so sure. Operations like sigprocmask and sigaction really have
> always been entirely atomic from the userland perspective before. Now it
> becomes possible to read from /proc e.g. a blocked set that never existed
> as such (one word updated by sigprocmask but not yet the next word).
If you have a small userspace buffer, that was previously possible too.
David
next prev parent reply other threads:[~2010-04-10 8:16 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-22 18:41 [PATCH -mm 3/3] proc: make task_sig() lockless Oleg Nesterov
2010-03-23 8:30 ` David Howells
2010-03-23 8:37 ` David Howells
2010-03-23 10:57 ` Oleg Nesterov
2010-03-24 8:37 ` David Howells
2010-03-24 15:00 ` Oleg Nesterov
2010-04-09 19:59 ` Roland McGrath
2010-04-10 8:16 ` David Howells [this message]
2010-04-12 19:50 ` Oleg Nesterov
2010-04-13 6:30 ` Roland McGrath
2010-04-13 20:00 ` Oleg Nesterov
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