From: Cyrill Gorcunov <gorcunov@openvz.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
LKML <linux-kernel@vger.kernel.org>,
Pavel Emelyanov <xemul@parallels.com>,
Jiri Slaby <jslaby@suse.cz>
Subject: Re: [RFC] tty: Add get- ioctls to fetch tty status
Date: Sun, 23 Sep 2012 19:21:37 +0400 [thread overview]
Message-ID: <20120923152137.GC2994@moon> (raw)
In-Reply-To: <34f6ba7b-2c50-492e-9267-52d328a8d37f@email.android.com>
On Sun, Sep 23, 2012 at 07:46:24AM -0700, H. Peter Anvin wrote:
> >changed right after that operation). Maybe I should put everything to
> >procfs, or stick back with ioctl calls?
>
> The problem as I see it is that you don't know if your process is
> the lock holder.
Wait, Peter, this lock is set via ioctl call on the fd obtained from
open(ptmx) call, so i fail to see how one can setup such lock without
having fd on the hands. When we do checkpoint the processes we expect
the user passes us the pid of process which is the leader not some
subtree (we can deal with process subtrees too but it is not
encouraged ;)
next prev parent reply other threads:[~2012-09-23 15:21 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-13 9:56 [RFC] tty: Add get- ioctls to fetch tty status Cyrill Gorcunov
2012-09-13 11:46 ` Jiri Slaby
2012-09-13 11:51 ` Cyrill Gorcunov
2012-09-13 12:51 ` Alan Cox
2012-09-13 12:54 ` Cyrill Gorcunov
2012-09-13 16:25 ` Alan Cox
2012-09-13 16:41 ` Cyrill Gorcunov
2012-09-22 18:06 ` Cyrill Gorcunov
2012-09-22 20:07 ` Greg Kroah-Hartman
2012-09-22 20:11 ` Cyrill Gorcunov
2012-09-22 21:52 ` Cyrill Gorcunov
2012-09-23 1:09 ` Greg Kroah-Hartman
2012-09-23 6:40 ` Cyrill Gorcunov
2012-09-23 14:46 ` H. Peter Anvin
2012-09-23 15:21 ` Cyrill Gorcunov [this message]
2012-09-24 14:14 ` Cyrill Gorcunov
2012-09-27 14:05 ` Cyrill Gorcunov
2012-09-27 14:14 ` Alan Cox
2012-09-27 14:14 ` Cyrill Gorcunov
2012-09-27 14:17 ` H. Peter Anvin
2012-09-27 14:21 ` Cyrill Gorcunov
2012-09-27 14:43 ` H. Peter Anvin
2012-09-27 14:48 ` Cyrill Gorcunov
2012-09-27 15:05 ` H. Peter Anvin
2012-09-27 15:13 ` Alan Cox
2012-09-27 15:23 ` Cyrill Gorcunov
2012-09-27 16:00 ` Alan Cox
2012-09-27 16:06 ` Cyrill Gorcunov
2012-09-27 15:47 ` Cyrill Gorcunov
2012-09-22 23:15 ` Alan Cox
2012-09-23 1:43 ` Eric W. Biederman
2012-09-23 6:40 ` Cyrill Gorcunov
2012-09-23 14:44 ` H. Peter Anvin
2012-09-23 15:22 ` Cyrill Gorcunov
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