From: Al Viro <viro@ZenIV.linux.org.uk>
To: Mike Frysinger <vapier@gentoo.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
Oleg Nesterov <oleg@redhat.com>
Subject: Re: [RFC] TIF_NOTIFY_RESUME, arch/*/*/*signal*.c and all such
Date: Wed, 2 May 2012 18:24:53 +0100 [thread overview]
Message-ID: <20120502172453.GL6871@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20120501055226.GH6871@ZenIV.linux.org.uk>
On Tue, May 01, 2012 at 06:52:26AM +0100, Al Viro wrote:
> IOW, here's what I'd suggest doing:
>
> * add that regs->orig_p0 = -1; to handle_restart()
> * add jump .Lresume_userspace_1 after the call of do_notify_resume()
> * instead of RESTORE_CONTEXT/rti in ret_from_fork and kernel_execve()
> have them jump to .Lresume_userspace.
arrrgh... The last one is unfortunately not so simple - you have that
in the guts of _system_call, which is called via pseudo_long_call,
so it would ought to be a call into the middle of _system_call, followed
by that RESTORE_CONTEXT/rti...
next prev parent reply other threads:[~2012-05-02 17:24 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120420004303.GB6871@ZenIV.linux.org.uk>
[not found] ` <CA+55aFxQR8g3TycW7nOVjjnnsaWWW-Gh74-bV6rUm+7SRTm25g@mail.gmail.com>
[not found] ` <20120420025438.GD6871@ZenIV.linux.org.uk>
[not found] ` <CA+55aFzinX_6DVvDTyxrsP6VEHVY2Q+Y=e+qksnAjR+oT3GZew@mail.gmail.com>
[not found] ` <20120420080914.GF6871@ZenIV.linux.org.uk>
[not found] ` <CA+55aFxia+u3VAf0qN-2wv7DyAQZK-Z8=n=cqUvo--+C905aFg@mail.gmail.com>
[not found] ` <20120420160848.GG6871@ZenIV.linux.org.uk>
[not found] ` <20120420164239.GH6871@ZenIV.linux.org.uk>
[not found] ` <CA+55aFzuTspDyyLaOA-g-dTWydaUeeWo9uVGR+rZ=ZJzPW_Ocw@mail.gmail.com>
[not found] ` <20120420180748.GI6871@ZenIV.linux.org.uk>
2012-04-23 18:01 ` [RFC] TIF_NOTIFY_RESUME, arch/*/*/*signal*.c and all such Al Viro
2012-04-23 18:01 ` Al Viro
2012-04-23 18:37 ` Oleg Nesterov
2012-04-24 7:26 ` Al Viro
2012-04-25 3:06 ` Al Viro
2012-04-25 3:06 ` Al Viro
2012-04-25 12:37 ` Oleg Nesterov
2012-04-25 12:50 ` Al Viro
2012-04-25 13:03 ` Oleg Nesterov
2012-04-25 13:32 ` Oleg Nesterov
2012-04-25 13:32 ` Al Viro
2012-04-25 14:52 ` Oleg Nesterov
2012-04-25 15:46 ` Oleg Nesterov
2012-04-25 16:10 ` Al Viro
2012-04-25 17:02 ` Oleg Nesterov
2012-04-25 17:51 ` Al Viro
2012-04-26 7:15 ` Martin Schwidefsky
2012-04-26 7:25 ` David Miller
2012-04-26 13:52 ` Oleg Nesterov
2012-04-26 14:31 ` Martin Schwidefsky
2012-04-26 14:31 ` Martin Schwidefsky
2012-04-26 13:22 ` Oleg Nesterov
2012-04-26 18:37 ` Oleg Nesterov
2012-04-26 23:19 ` Al Viro
2012-04-27 17:24 ` Oleg Nesterov
2012-04-27 17:24 ` Oleg Nesterov
2012-04-27 17:54 ` Oleg Nesterov
2012-05-02 10:37 ` Matt Fleming
2012-05-02 14:14 ` Al Viro
2012-05-02 14:14 ` Al Viro
2012-04-27 18:45 ` Al Viro
2012-04-27 19:14 ` Geert Uytterhoeven
2012-04-27 19:34 ` Al Viro
2012-04-29 22:51 ` Al Viro
2012-04-30 6:39 ` Greg Ungerer
2012-04-27 19:42 ` Al Viro
2012-04-27 20:20 ` Roland McGrath
2012-04-27 21:12 ` Al Viro
2012-04-27 21:27 ` Roland McGrath
2012-04-27 23:15 ` Al Viro
2012-04-27 23:32 ` Al Viro
2012-04-29 4:12 ` Al Viro
2012-04-29 4:12 ` Al Viro
2012-04-30 8:06 ` Martin Schwidefsky
2012-04-27 23:50 ` Al Viro
2012-04-28 18:51 ` [PATCH] arch/tile: avoid calling do_signal() after fork from a kernel thread Chris Metcalf
2012-04-28 20:55 ` Al Viro
2012-04-28 20:55 ` Al Viro
2012-04-28 21:46 ` Chris Metcalf
2012-04-29 0:55 ` Al Viro
2012-04-28 18:51 ` [PATCH v2] arch/tile: fix up some issues in calling do_work_pending() Chris Metcalf
2012-04-29 3:49 ` [PATCH] arch/tile: avoid calling do_signal() after fork from a kernel thread Chris Metcalf
2012-04-29 3:49 ` Chris Metcalf
2012-04-28 2:42 ` [RFC] TIF_NOTIFY_RESUME, arch/*/*/*signal*.c and all such Al Viro
2012-04-28 3:32 ` Al Viro
2012-04-28 3:36 ` Al Viro
2012-04-29 16:33 ` Oleg Nesterov
2012-04-29 16:18 ` Oleg Nesterov
2012-04-29 18:05 ` Al Viro
2012-05-01 4:31 ` Al Viro
2012-05-01 5:06 ` Mike Frysinger
2012-05-01 5:52 ` Al Viro
2012-05-02 17:24 ` Al Viro [this message]
2012-05-02 18:30 ` Oleg Nesterov
2012-04-29 16:41 ` Oleg Nesterov
2012-04-29 16:41 ` Oleg Nesterov
2012-04-29 18:09 ` Al Viro
2012-04-29 18:25 ` Oleg Nesterov
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