From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: 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@avagotech.com>,
Praveen Krishnamoorthy <praveen.krishnamoorthy@a>
Subject: Re: [RFC v2 3/6] kthread: warn on kill signal if not OOM
Date: Tue, 09 Sep 2014 16:01:32 -0700 [thread overview]
Message-ID: <5762134.BLS0EbmNJd@dtor-glaptop> (raw)
In-Reply-To: <1410302783.13298.50.camel@jarvis.lan>
On Tuesday, September 09, 2014 03:46:23 PM James Bottomley wrote:
> On Wed, 2014-09-10 at 07:41 +0900, Tejun Heo wrote:
> >
> > The thing is that we have to have dynamic mechanism to listen for
> > device attachments no matter what and such mechanism has been in place
> > for a long time at this point. The synchronous wait simply doesn't
> > serve any purpose anymore and kinda gets in the way in that it makes
> > it a possibly extremely slow process to tell whether loading of a
> > module succeeded or not because the wait for the initial round of
> > probe is piggybacked.
>
> OK, so we just fire and forget in userland ... why bother inventing an
> elaborate new infrastructure in the kernel to do exactly what
>
> modprobe <mod> &
>
> would do?
Just so we do not forget: we also want the no-modules case to also be able
to probe asynchronously so that a slow device does not stall kernel booting.
Thanks.
--
Dmitry
WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: 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@avagotech.com>,
Praveen Krishnamoorthy <praveen.krishnamoorthy@avagotech.com>,
Sreekanth Reddy <sreekanth.reddy@avagotech.com>,
Abhijit Mahajan <abhijit.mahajan@avagotech.com>,
Cas ey Leedom <leedom@chelsio.com>,
Hariprasad S <hariprasad@chelsio.com>,
MPT-FusionLinux.pdl@avagotech.com,
Linux SCSI List <linux-scsi@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: [RFC v2 3/6] kthread: warn on kill signal if not OOM
Date: Tue, 09 Sep 2014 16:01:32 -0700 [thread overview]
Message-ID: <5762134.BLS0EbmNJd@dtor-glaptop> (raw)
In-Reply-To: <1410302783.13298.50.camel@jarvis.lan>
On Tuesday, September 09, 2014 03:46:23 PM James Bottomley wrote:
> On Wed, 2014-09-10 at 07:41 +0900, Tejun Heo wrote:
> >
> > The thing is that we have to have dynamic mechanism to listen for
> > device attachments no matter what and such mechanism has been in place
> > for a long time at this point. The synchronous wait simply doesn't
> > serve any purpose anymore and kinda gets in the way in that it makes
> > it a possibly extremely slow process to tell whether loading of a
> > module succeeded or not because the wait for the initial round of
> > probe is piggybacked.
>
> OK, so we just fire and forget in userland ... why bother inventing an
> elaborate new infrastructure in the kernel to do exactly what
>
> modprobe <mod> &
>
> would do?
Just so we do not forget: we also want the no-modules case to also be able
to probe asynchronously so that a slow device does not stall kernel booting.
Thanks.
--
Dmitry
WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: 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@avagotech.com>,
Praveen Krishnamoorthy <praveen.krishnamoorthy@a
Subject: Re: [RFC v2 3/6] kthread: warn on kill signal if not OOM
Date: Tue, 09 Sep 2014 16:01:32 -0700 [thread overview]
Message-ID: <5762134.BLS0EbmNJd@dtor-glaptop> (raw)
In-Reply-To: <1410302783.13298.50.camel@jarvis.lan>
On Tuesday, September 09, 2014 03:46:23 PM James Bottomley wrote:
> On Wed, 2014-09-10 at 07:41 +0900, Tejun Heo wrote:
> >
> > The thing is that we have to have dynamic mechanism to listen for
> > device attachments no matter what and such mechanism has been in place
> > for a long time at this point. The synchronous wait simply doesn't
> > serve any purpose anymore and kinda gets in the way in that it makes
> > it a possibly extremely slow process to tell whether loading of a
> > module succeeded or not because the wait for the initial round of
> > probe is piggybacked.
>
> OK, so we just fire and forget in userland ... why bother inventing an
> elaborate new infrastructure in the kernel to do exactly what
>
> modprobe <mod> &
>
> would do?
Just so we do not forget: we also want the no-modules case to also be able
to probe asynchronously so that a slow device does not stall kernel booting.
Thanks.
--
Dmitry
next prev parent reply other threads:[~2014-09-09 23:01 UTC|newest]
Thread overview: 227+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-05 6:37 [RFC v2 0/6] driver-core: add asynch probe support Luis R. Rodriguez
2014-09-05 6:37 ` [RFC v2 1/6] driver-core: generalize freeing driver private member Luis R. Rodriguez
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 11:24 ` Oleg Nesterov
2014-09-05 17:25 ` Luis R. Rodriguez
2014-09-05 17:25 ` Luis R. Rodriguez
2014-09-05 22:10 ` Dmitry Torokhov
2014-10-20 23:43 ` Luis R. Rodriguez
2014-10-20 23:43 ` Luis R. Rodriguez
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 6:37 ` Luis R. Rodriguez
2014-09-05 7:19 ` Tejun Heo
2014-09-05 7:19 ` Tejun Heo
2014-09-05 7:47 ` Luis R. Rodriguez
2014-09-05 7:47 ` Luis R. Rodriguez
2014-09-05 7:47 ` Luis R. Rodriguez
2014-09-05 9:14 ` Mike Galbraith
2014-09-05 9:14 ` Mike Galbraith
2014-09-05 9:14 ` Mike Galbraith
2014-09-05 14:12 ` Tejun Heo
2014-09-05 14:12 ` Tejun Heo
2014-09-05 14:12 ` Tejun Heo
2014-09-05 16:44 ` Dmitry Torokhov
2014-09-05 16:44 ` Dmitry Torokhov
2014-09-05 17:49 ` Tejun Heo
2014-09-05 17:49 ` Tejun Heo
2014-09-05 18:10 ` Dmitry Torokhov
2014-09-05 18:10 ` Dmitry Torokhov
2014-09-05 22:29 ` Tejun Heo
2014-09-05 22:29 ` Tejun Heo
2014-09-05 22:31 ` Tejun Heo
2014-09-05 22:31 ` Tejun Heo
2014-09-05 22:49 ` Dmitry Torokhov
2014-09-05 22:49 ` Dmitry Torokhov
2014-09-05 22:55 ` Tejun Heo
2014-09-05 22:55 ` Tejun Heo
2014-09-05 23:22 ` Dmitry Torokhov
2014-09-05 23:22 ` Dmitry Torokhov
2014-09-05 23:32 ` Tejun Heo
2014-09-05 23:32 ` Tejun Heo
2014-09-05 22:45 ` Arjan van de Ven
2014-09-05 22:45 ` Arjan van de Ven
2014-09-05 22:52 ` Dmitry Torokhov
2014-09-05 22:52 ` Dmitry Torokhov
2014-09-05 22:52 ` Dmitry Torokhov
2014-09-05 22:57 ` Tejun Heo
2014-09-05 22:57 ` Tejun Heo
2014-09-05 23:05 ` Arjan van de Ven
2014-09-05 23:05 ` Arjan van de Ven
2014-09-05 23:05 ` Arjan van de Ven
2014-09-05 23:18 ` Dmitry Torokhov
2014-09-05 23:18 ` Dmitry Torokhov
2014-09-05 23:18 ` Dmitry Torokhov
2014-09-05 18:12 ` Luis R. Rodriguez
2014-09-05 18:12 ` Luis R. Rodriguez
2014-09-05 18:12 ` Luis R. Rodriguez
2014-09-05 18:29 ` Dmitry Torokhov
2014-09-05 18:29 ` Dmitry Torokhov
2014-09-05 18:29 ` Dmitry Torokhov
2014-09-05 22:40 ` Tejun Heo
2014-09-05 22:40 ` Tejun Heo
2014-09-05 22:40 ` Tejun Heo
2014-09-09 1:04 ` Luis R. Rodriguez
2014-09-09 1:04 ` Luis R. Rodriguez
2014-09-09 1:04 ` Luis R. Rodriguez
2014-09-09 1:10 ` Tejun Heo
2014-09-09 1:10 ` Tejun Heo
2014-09-09 1:10 ` Tejun Heo
2014-09-09 1:13 ` Tejun Heo
2014-09-09 1:13 ` Tejun Heo
2014-09-09 1:13 ` Tejun Heo
2014-09-09 1:22 ` Tejun Heo
2014-09-09 1:22 ` Tejun Heo
2014-09-09 1:22 ` Tejun Heo
2014-09-09 1:26 ` Luis R. Rodriguez
2014-09-09 1:26 ` Luis R. Rodriguez
2014-09-09 1:26 ` Luis R. Rodriguez
2014-09-09 1:29 ` Tejun Heo
2014-09-09 1:29 ` Tejun Heo
2014-09-09 1:29 ` Tejun Heo
2014-09-09 1:38 ` Luis R. Rodriguez
2014-09-09 1:38 ` Luis R. Rodriguez
2014-09-09 1:38 ` Luis R. Rodriguez
2014-09-09 1:47 ` Tejun Heo
2014-09-09 1:47 ` Tejun Heo
2014-09-09 1:47 ` Tejun Heo
2014-09-09 2:28 ` Luis R. Rodriguez
2014-09-09 2:28 ` Luis R. Rodriguez
2014-09-09 2:28 ` Luis R. Rodriguez
2014-09-09 2:39 ` Tejun Heo
2014-09-09 2:39 ` Tejun Heo
2014-09-09 2:39 ` Tejun Heo
2014-09-09 2:57 ` Luis R. Rodriguez
2014-09-09 2:57 ` Luis R. Rodriguez
2014-09-09 2:57 ` Luis R. Rodriguez
2014-09-09 3:03 ` Tejun Heo
2014-09-09 3:03 ` Tejun Heo
2014-09-09 3:03 ` Tejun Heo
2014-09-09 3:19 ` Luis R. Rodriguez
2014-09-09 3:19 ` Luis R. Rodriguez
2014-09-09 3:19 ` Luis R. Rodriguez
2014-09-09 3:25 ` Tejun Heo
2014-09-09 3:25 ` Tejun Heo
2014-09-09 3:25 ` Tejun Heo
2014-09-09 23:03 ` Tejun Heo
2014-09-09 23:03 ` Tejun Heo
2014-09-09 23:03 ` Tejun Heo
2014-09-12 20:14 ` Luis R. Rodriguez
2014-09-12 20:14 ` Luis R. Rodriguez
2014-09-22 16:36 ` Luis R. Rodriguez
2014-09-22 16:36 ` Luis R. Rodriguez
2014-09-10 5:13 ` Tom Gundersen
2014-09-10 5:13 ` Tom Gundersen
2014-09-10 5:13 ` Tom Gundersen
2014-09-09 5:38 ` James Bottomley
2014-09-09 5:38 ` James Bottomley
2014-09-09 5:38 ` James Bottomley
2014-09-09 19:16 ` Luis R. Rodriguez
2014-09-09 19:16 ` Luis R. Rodriguez
2014-09-09 19:16 ` Luis R. Rodriguez
2014-09-09 19:35 ` James Bottomley
2014-09-09 19:35 ` James Bottomley
2014-09-09 19:35 ` James Bottomley
2014-09-09 20:45 ` Luis R. Rodriguez
2014-09-09 20:45 ` Luis R. Rodriguez
2014-09-09 20:45 ` Luis R. Rodriguez
2014-09-10 6:46 ` Tom Gundersen
2014-09-10 6:46 ` Tom Gundersen
2014-09-10 6:46 ` [systemd-devel] " Tom Gundersen
2014-09-10 10:07 ` Ceriel Jacobs
2014-09-10 10:07 ` Ceriel Jacobs
2014-09-10 10:07 ` Ceriel Jacobs
2014-09-10 13:31 ` James Bottomley
2014-09-10 13:31 ` James Bottomley
2014-09-10 13:31 ` James Bottomley
2014-09-10 21:10 ` Luis R. Rodriguez
2014-09-10 21:10 ` Luis R. Rodriguez
2014-09-10 21:10 ` [systemd-devel] " Luis R. Rodriguez
2014-09-11 5:42 ` Alexander E. Patrakov
2014-09-11 5:42 ` Alexander E. Patrakov
2014-09-11 5:42 ` [systemd-devel] " Alexander E. Patrakov
2014-09-11 21:43 ` Tom Gundersen
2014-09-11 21:43 ` Tom Gundersen
2014-09-11 21:43 ` [systemd-devel] " Tom Gundersen
2014-09-11 22:26 ` Luis R. Rodriguez
2014-09-11 22:26 ` Luis R. Rodriguez
2014-09-11 22:26 ` Luis R. Rodriguez
2014-09-12 5:48 ` Tom Gundersen
2014-09-12 5:48 ` Tom Gundersen
2014-09-12 5:48 ` [systemd-devel] " Tom Gundersen
2014-09-12 20:09 ` Luis R. Rodriguez
2014-09-12 20:09 ` Luis R. Rodriguez
2014-09-12 20:09 ` [systemd-devel] " Luis R. Rodriguez
2014-10-10 21:54 ` Anatol Pomozov
2014-10-10 21:54 ` Anatol Pomozov
2014-10-10 21:54 ` [systemd-devel] " Anatol Pomozov
2014-10-10 22:45 ` Tom Gundersen
2014-10-10 22:45 ` Tom Gundersen
2014-10-10 22:45 ` [systemd-devel] " Tom Gundersen
2014-10-15 19:41 ` Anatol Pomozov
2014-10-15 19:41 ` Anatol Pomozov
2014-10-15 19:41 ` [systemd-devel] " Anatol Pomozov
2014-10-15 19:46 ` Alexander E. Patrakov
2014-10-15 19:46 ` Alexander E. Patrakov
2014-10-15 19:46 ` [systemd-devel] " Alexander E. Patrakov
2014-09-09 21:42 ` Tejun Heo
2014-09-09 21:42 ` Tejun Heo
2014-09-09 21:42 ` Tejun Heo
2014-09-09 22:26 ` James Bottomley
2014-09-09 22:26 ` James Bottomley
2014-09-09 22:26 ` James Bottomley
2014-09-09 22:41 ` Tejun Heo
2014-09-09 22:41 ` Tejun Heo
2014-09-09 22:41 ` Tejun Heo
2014-09-09 22:46 ` James Bottomley
2014-09-09 22:46 ` James Bottomley
2014-09-09 22:46 ` James Bottomley
2014-09-09 22:52 ` Tejun Heo
2014-09-09 22:52 ` Tejun Heo
2014-09-09 22:52 ` Tejun Heo
2014-09-09 23:01 ` Dmitry Torokhov [this message]
2014-09-09 23:01 ` Dmitry Torokhov
2014-09-09 23:01 ` Dmitry Torokhov
2014-09-11 19:59 ` James Bottomley
2014-09-11 19:59 ` James Bottomley
2014-09-11 19:59 ` James Bottomley
2014-09-11 20:23 ` Dmitry Torokhov
2014-09-11 20:23 ` Dmitry Torokhov
2014-09-11 20:23 ` Dmitry Torokhov
2014-09-11 20:42 ` Luis R. Rodriguez
2014-09-11 20:42 ` Luis R. Rodriguez
2014-09-11 20:42 ` Luis R. Rodriguez
2014-09-11 20:53 ` Dmitry Torokhov
2014-09-11 20:53 ` Dmitry Torokhov
2014-09-11 20:53 ` Dmitry Torokhov
2014-09-11 21:08 ` Luis R. Rodriguez
2014-09-11 21:08 ` Luis R. Rodriguez
2014-09-11 21:08 ` Luis R. Rodriguez
2014-09-22 19:49 ` Pavel Machek
2014-09-22 19:49 ` Pavel Machek
2014-09-22 19:49 ` Pavel Machek
2014-09-22 20:23 ` Dmitry Torokhov
2014-09-22 20:23 ` Dmitry Torokhov
2014-09-22 20:23 ` Dmitry Torokhov
2014-09-30 21:06 ` Pavel Machek
2014-09-30 21:06 ` Pavel Machek
2014-09-30 21:06 ` Pavel Machek
2014-09-30 21:34 ` Dmitry Torokhov
2014-09-30 21:34 ` Dmitry Torokhov
2014-09-30 21:34 ` Dmitry Torokhov
2014-09-09 22:00 ` Jiri Kosina
2014-09-09 22:00 ` Jiri Kosina
2014-09-09 22:00 ` Jiri Kosina
2014-09-05 10:59 ` Oleg Nesterov
2014-09-05 10:59 ` Oleg Nesterov
2014-09-05 17:35 ` Luis R. Rodriguez
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
2014-09-05 6:37 ` [RFC v2 6/6] pata_marvell: " Luis R. Rodriguez
2014-09-05 6:59 ` Alexander E. Patrakov
2014-09-05 7:15 ` Tejun Heo
2014-09-05 7:11 ` [RFC v2 0/6] driver-core: add asynch probe support Tejun Heo
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