From: Oleg Nesterov <oleg@redhat.com>
To: Al Viro <viro@ZenIV.linux.org.uk>, Andrey Vagin <avagin@openvz.org>
Cc: Eric Sandeen <sandeen@sandeen.net>,
Richard Weinberger <richard@nod.at>,
Linux Kernel <linux-kernel@vger.kernel.org>,
xfs@oss.sgi.com, Christoph Hellwig <hch@infradead.org>,
Dave Jones <davej@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: 3.14-rc2 XFS backtrace because irqs_disabled.
Date: Fri, 14 Feb 2014 17:08:54 +0100 [thread overview]
Message-ID: <20140214160854.GA21011@redhat.com> (raw)
In-Reply-To: <20140214152028.GT18016@ZenIV.linux.org.uk>
On 02/14, Al Viro wrote:
>
> BTW, Oleg, could you explain why does PTRACE_PEEK_SIGINFO copy ->si_code
> separately? IOW, why do we want the upper 16 bits of ->si_code exposed?
> It used to be a strictly internal thing IIRC (it's been what, 2.3.late?)
Yes, but checkpoint/restart tools want to dump/restore the internal part
of ->si_code too.
See also the "task_pid_vnr(current) == pid" hack in do_rt_sigqueueinfo(),
this allows to queue a SI_FROMKERNEL() siginfo.
Oleg.
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WARNING: multiple messages have this Message-ID (diff)
From: Oleg Nesterov <oleg@redhat.com>
To: Al Viro <viro@ZenIV.linux.org.uk>, Andrey Vagin <avagin@openvz.org>
Cc: Richard Weinberger <richard@nod.at>,
Christoph Hellwig <hch@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Dave Chinner <david@fromorbit.com>, Dave Jones <davej@redhat.com>,
Eric Sandeen <sandeen@sandeen.net>,
Linux Kernel <linux-kernel@vger.kernel.org>,
xfs@oss.sgi.com
Subject: Re: 3.14-rc2 XFS backtrace because irqs_disabled.
Date: Fri, 14 Feb 2014 17:08:54 +0100 [thread overview]
Message-ID: <20140214160854.GA21011@redhat.com> (raw)
In-Reply-To: <20140214152028.GT18016@ZenIV.linux.org.uk>
On 02/14, Al Viro wrote:
>
> BTW, Oleg, could you explain why does PTRACE_PEEK_SIGINFO copy ->si_code
> separately? IOW, why do we want the upper 16 bits of ->si_code exposed?
> It used to be a strictly internal thing IIRC (it's been what, 2.3.late?)
Yes, but checkpoint/restart tools want to dump/restore the internal part
of ->si_code too.
See also the "task_pid_vnr(current) == pid" hack in do_rt_sigqueueinfo(),
this allows to queue a SI_FROMKERNEL() siginfo.
Oleg.
next prev parent reply other threads:[~2014-02-14 16:09 UTC|newest]
Thread overview: 132+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-11 17:27 3.14-rc2 XFS backtrace because irqs_disabled Dave Jones
2014-02-11 17:27 ` Dave Jones
2014-02-11 21:08 ` Dave Chinner
2014-02-11 21:08 ` Dave Chinner
2014-02-11 21:49 ` Eric Sandeen
2014-02-11 21:49 ` Eric Sandeen
2014-02-12 0:44 ` Dave Jones
2014-02-12 0:44 ` Dave Jones
2014-02-12 1:09 ` Al Viro
2014-02-12 1:09 ` Al Viro
2014-02-12 2:52 ` Linus Torvalds
2014-02-12 2:52 ` Linus Torvalds
2014-02-12 4:03 ` Dave Jones
2014-02-12 4:03 ` Dave Jones
2014-02-12 4:22 ` Al Viro
2014-02-12 4:22 ` Al Viro
2014-02-12 5:40 ` Dave Chinner
2014-02-12 5:40 ` Dave Chinner
2014-02-12 5:50 ` Dave Jones
2014-02-12 5:50 ` Dave Jones
2014-02-12 6:10 ` Dave Chinner
2014-02-12 6:10 ` Dave Chinner
2014-02-12 6:31 ` Dave Chinner
2014-02-12 6:31 ` Dave Chinner
2014-02-12 6:59 ` Linus Torvalds
2014-02-12 6:59 ` Linus Torvalds
2014-02-12 8:13 ` Tejun Heo
2014-02-12 8:13 ` Tejun Heo
2014-02-12 12:44 ` Steven Rostedt
2014-02-12 12:44 ` Steven Rostedt
2014-02-12 8:35 ` Dave Chinner
2014-02-12 8:35 ` Dave Chinner
2014-02-12 12:50 ` Steven Rostedt
2014-02-12 12:50 ` Steven Rostedt
2014-02-12 12:40 ` Steven Rostedt
2014-02-12 12:40 ` Steven Rostedt
2014-02-12 13:29 ` Peter Zijlstra
2014-02-12 13:29 ` Peter Zijlstra
2014-02-12 14:25 ` Dave Jones
2014-02-12 14:25 ` Dave Jones
2014-02-12 21:14 ` Dave Chinner
2014-02-12 21:14 ` Dave Chinner
2014-02-12 15:57 ` Eric Sandeen
2014-02-12 15:57 ` Eric Sandeen
2014-02-12 6:28 ` Linus Torvalds
2014-02-12 6:28 ` Linus Torvalds
2014-02-12 7:18 ` Dave Chinner
2014-02-12 7:18 ` Dave Chinner
2014-02-14 0:24 ` Dave Chinner
2014-02-14 0:24 ` Dave Chinner
2014-02-14 16:01 ` Dave Jones
2014-02-14 16:01 ` Dave Jones
2014-02-15 22:23 ` Dave Chinner
2014-02-15 22:23 ` Dave Chinner
2014-02-15 22:28 ` Dave Jones
2014-02-15 22:28 ` Dave Jones
2014-02-15 22:43 ` Linus Torvalds
2014-02-15 22:43 ` Linus Torvalds
2014-02-15 23:50 ` Linus Torvalds
2014-02-15 23:50 ` Linus Torvalds
2014-02-15 23:50 ` Linus Torvalds
2014-02-18 1:27 ` Dave Chinner
2014-02-18 1:27 ` Dave Chinner
2014-02-18 1:27 ` Dave Chinner
2014-02-12 11:39 ` Al Viro
2014-02-12 11:39 ` Al Viro
2014-02-12 20:13 ` Linus Torvalds
2014-02-12 20:13 ` Linus Torvalds
2014-02-12 21:14 ` Al Viro
2014-02-12 21:14 ` Al Viro
2014-02-12 21:32 ` Linus Torvalds
2014-02-12 21:32 ` Linus Torvalds
2014-02-12 21:44 ` Al Viro
2014-02-12 21:44 ` Al Viro
2014-02-13 20:51 ` Al Viro
2014-02-13 20:51 ` Al Viro
2014-02-14 0:09 ` Al Viro
2014-02-14 0:09 ` Al Viro
2014-02-14 13:25 ` Christoph Hellwig
2014-02-14 13:25 ` Christoph Hellwig
2014-02-14 13:29 ` Richard Weinberger
2014-02-14 13:29 ` Richard Weinberger
2014-02-14 15:20 ` Al Viro
2014-02-14 15:20 ` Al Viro
2014-02-14 16:08 ` Oleg Nesterov [this message]
2014-02-14 16:08 ` Oleg Nesterov
2014-02-13 17:40 ` Oleg Nesterov
2014-02-13 17:40 ` Oleg Nesterov
2014-02-13 17:58 ` Linus Torvalds
2014-02-13 17:58 ` Linus Torvalds
2014-02-13 18:10 ` Oleg Nesterov
2014-02-13 18:10 ` Oleg Nesterov
2014-02-13 18:37 ` Oleg Nesterov
2014-02-13 18:37 ` Oleg Nesterov
2014-02-15 5:25 ` Al Viro
2014-02-15 5:25 ` Al Viro
2014-02-15 14:27 ` Oleg Nesterov
2014-02-15 14:27 ` Oleg Nesterov
2014-02-15 15:22 ` Al Viro
2014-02-15 15:22 ` Al Viro
2014-02-15 15:33 ` Oleg Nesterov
2014-02-15 15:33 ` Oleg Nesterov
2014-02-15 15:36 ` Al Viro
2014-02-15 15:36 ` Al Viro
2014-02-15 15:58 ` Al Viro
2014-02-15 15:58 ` Al Viro
2014-02-15 16:59 ` Al Viro
2014-02-15 16:59 ` Al Viro
2014-02-15 17:43 ` Oleg Nesterov
2014-02-15 17:43 ` Oleg Nesterov
2014-02-15 18:05 ` Al Viro
2014-02-15 18:05 ` Al Viro
2014-02-15 18:45 ` Oleg Nesterov
2014-02-15 18:45 ` Oleg Nesterov
2014-02-17 16:57 ` Oleg Nesterov
2014-02-17 16:57 ` Oleg Nesterov
2014-02-17 17:40 ` Al Viro
2014-02-17 17:40 ` Al Viro
2014-02-17 17:46 ` Oleg Nesterov
2014-02-17 17:46 ` Oleg Nesterov
2014-02-17 17:54 ` Al Viro
2014-02-17 17:54 ` Al Viro
2014-02-14 16:13 ` Christoph Hellwig
2014-02-14 16:13 ` Christoph Hellwig
2014-02-14 16:16 ` Al Viro
2014-02-14 16:16 ` Al Viro
2014-02-14 16:18 ` Al Viro
2014-02-14 16:18 ` Al Viro
2014-02-14 16:19 ` Christoph Hellwig
2014-02-14 16:19 ` Christoph Hellwig
2014-02-15 14:46 ` Oleg Nesterov
2014-02-15 14:46 ` Oleg Nesterov
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