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From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>,
	Tejun Heo <tj@kernel.org>,
	"Luis R. Rodriguez" <mcgrof@do-not-panic.com>,
	Lennart Poettering <lennart@poettering.net>,
	Kay Sievers <kay@vrfy.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Wu Zhangjin <falcon@meizu.com>, Takashi Iwai <tiwai@suse.de>,
	Arjan van de Ven <arjan@linux.intel.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Oleg Nesterov <oleg@redhat.com>,
	hare@suse.com, Andrew Morton <akpm@linux-foundation.org>,
	Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
	Joseph Salisbury <joseph.salisbury@canonical.com>,
	Benjamin Poirier <bpoirier@suse.de>,
	Santosh Rastapur <santosh@chelsio.com>,
	One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
	Tim Gardner <tim.gardner@canonical.com>,
	Pierre Fersing <pierre-fersing@pierref.org>,
	Nagalakshmi Nandigama <nagalakshmi.nandigama@avagote
Subject: Re: [RFC v2 3/6] kthread: warn on kill signal if not OOM
Date: Tue, 30 Sep 2014 14:34:44 -0700	[thread overview]
Message-ID: <20140930213444.GA8259@dtor-glaptop> (raw)
In-Reply-To: <20140930210634.GC14283@amd>

On Tue, Sep 30, 2014 at 11:06:34PM +0200, Pavel Machek wrote:
> 
> On Mon 2014-09-22 13:23:54, Dmitry Torokhov wrote:
> > On Monday, September 22, 2014 09:49:06 PM Pavel Machek wrote:
> > > On Thu 2014-09-11 13:23:54, Dmitry Torokhov wrote:
> > > > On Thu, Sep 11, 2014 at 12:59:25PM -0700, James Bottomley wrote:
> 
> > > > > Yes, but we mostly do this anyway.  SCSI for instance does asynchronous
> > > > > scanning of attached devices (once the cards are probed)
> > > > 
> > > > What would it do it card was a bit slow to probe?
> > > > 
> > > > > but has a sync
> > > > > point for ordering.
> > > > 
> > > > Quite often we do not really care about ordering of devices. I mean,
> > > > does it matter if your mouse is discovered before your keyboard or
> > > > after?
> > > 
> > > Actually yes, I suspect it does.
> > > 
> > > I do evtest /dev/input/eventX by hand, occassionaly. It would be
> > > annoying if they moved between reboots.
> > 
> > I am sorry but you will have to cope with such annoyances. It' snot like we 
> > fail to boot the box here.
> > 
> > The systems are now mostly hot-pluggable and userland is supposed to
> > handle it, and it does, at least for input devices. If you want stable naming
> > use udev facilities to rename devices as needed or add needed symlinks (by-id, 
> > etc.).
> 
> Well, it would be nice if udev was not mandatory. Do the sync points
> for ordering actually cost us something?

Yes, boot time. We can save a second or two off the boot time if we probe
several devices/drivers simultaneously.

Thanks.

-- 
Dmitry

  reply	other threads:[~2014-09-30 21:34 UTC|newest]

Thread overview: 84+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1409899047-13045-1-git-send-email-mcgrof@do-not-panic.com>
2014-09-05  6:37 ` [RFC v2 2/6] driver-core: add driver async_probe support Luis R. Rodriguez
2014-09-05 11:24   ` Oleg Nesterov
2014-09-05 17:25     ` Luis R. Rodriguez
2014-09-05 22:10   ` Dmitry Torokhov
2014-10-20 23:43     ` Luis R. Rodriguez
2014-09-05  6:37 ` [RFC v2 3/6] kthread: warn on kill signal if not OOM Luis R. Rodriguez
2014-09-05  7:19   ` Tejun Heo
2014-09-05  7:47     ` Luis R. Rodriguez
2014-09-05  9:14       ` Mike Galbraith
2014-09-05 14:12       ` Tejun Heo
2014-09-05 16:44         ` Dmitry Torokhov
2014-09-05 17:49           ` Tejun Heo
2014-09-05 18:10             ` Dmitry Torokhov
2014-09-05 22:29               ` Tejun Heo
2014-09-05 22:31                 ` Tejun Heo
2014-09-05 22:49                   ` Dmitry Torokhov
2014-09-05 22:55                     ` Tejun Heo
2014-09-05 23:22                       ` Dmitry Torokhov
2014-09-05 23:32                         ` Tejun Heo
2014-09-05 22:45                 ` Arjan van de Ven
2014-09-05 22:52                   ` Dmitry Torokhov
2014-09-05 22:57                     ` Tejun Heo
2014-09-05 23:05                     ` Arjan van de Ven
2014-09-05 23:18                       ` Dmitry Torokhov
2014-09-05 18:12             ` Luis R. Rodriguez
2014-09-05 18:29               ` Dmitry Torokhov
2014-09-05 22:40               ` Tejun Heo
2014-09-09  1:04                 ` Luis R. Rodriguez
2014-09-09  1:10                   ` Tejun Heo
2014-09-09  1:13                     ` Tejun Heo
2014-09-09  1:22                     ` Tejun Heo
2014-09-09  1:26                       ` Luis R. Rodriguez
2014-09-09  1:29                         ` Tejun Heo
2014-09-09  1:38                           ` Luis R. Rodriguez
2014-09-09  1:47                             ` Tejun Heo
2014-09-09  2:28                               ` Luis R. Rodriguez
2014-09-09  2:39                                 ` Tejun Heo
2014-09-09  2:57                                   ` Luis R. Rodriguez
2014-09-09  3:03                                     ` Tejun Heo
2014-09-09  3:19                                       ` Luis R. Rodriguez
2014-09-09  3:25                                         ` Tejun Heo
2014-09-09 23:03                                           ` Tejun Heo
2014-09-12 20:14                                             ` Luis R. Rodriguez
2014-09-22 16:36                                     ` Luis R. Rodriguez
2014-09-10  5:13                         ` Tom Gundersen
2014-09-09  5:38                     ` James Bottomley
2014-09-09 19:16                       ` Luis R. Rodriguez
2014-09-09 19:35                         ` James Bottomley
2014-09-09 20:45                           ` Luis R. Rodriguez
2014-09-10  6:46                             ` Tom Gundersen
2014-09-10 10:07                               ` [systemd-devel] " Ceriel Jacobs
2014-09-10 13:31                                 ` James Bottomley
2014-09-10 21:10                               ` Luis R. Rodriguez
2014-09-11  5:42                                 ` Alexander E. Patrakov
2014-09-11 21:43                                 ` Tom Gundersen
2014-09-11 22:26                                   ` [systemd-devel] " Luis R. Rodriguez
2014-09-12  5:48                                     ` Tom Gundersen
2014-09-12 20:09                                       ` Luis R. Rodriguez
2014-10-10 21:54                                         ` Anatol Pomozov
2014-10-10 22:45                                           ` Tom Gundersen
2014-10-15 19:41                                             ` Anatol Pomozov
2014-10-15 19:46                                               ` Alexander E. Patrakov
2014-09-09 21:42                           ` Tejun Heo
2014-09-09 22:26                             ` James Bottomley
2014-09-09 22:41                               ` Tejun Heo
2014-09-09 22:46                                 ` James Bottomley
2014-09-09 22:52                                   ` Tejun Heo
2014-09-09 23:01                                   ` Dmitry Torokhov
2014-09-11 19:59                                     ` James Bottomley
2014-09-11 20:23                                       ` Dmitry Torokhov
2014-09-11 20:42                                         ` Luis R. Rodriguez
2014-09-11 20:53                                           ` Dmitry Torokhov
2014-09-11 21:08                                             ` Luis R. Rodriguez
2014-09-22 19:49                                         ` Pavel Machek
2014-09-22 20:23                                           ` Dmitry Torokhov
2014-09-30 21:06                                             ` Pavel Machek
2014-09-30 21:34                                               ` Dmitry Torokhov [this message]
2014-09-09 22:00                         ` Jiri Kosina
2014-09-05 10:59   ` Oleg Nesterov
2014-09-05 17:35     ` Luis R. Rodriguez
2014-09-05  6:37 ` [RFC v2 4/6] cxgb4: use async probe Luis R. Rodriguez
2014-09-05  6:37 ` [RFC v2 5/6] mptsas: " Luis R. Rodriguez
2014-09-05  7:16   ` Tejun Heo
2014-09-05  7:23   ` Hannes Reinecke

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