From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: [patch 4/7] ps3: Storage Driver Probing
Date: Sat, 26 May 2007 08:54:13 +1000 [thread overview]
Message-ID: <1180133653.19517.20.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.62.0705252143270.2657@pademelon.sonytel.be>
On Fri, 2007-05-25 at 21:48 +0200, Geert Uytterhoeven wrote:
> > > + msleep_interruptible(ms);
> > > + if (ms < 60000)
> > > + ms <<= 1;
> >
> > Is this timeout only for the disk spinup, or also for detecting
> media
> > added at run time, like inserting a DVD? One minute timeout for
> > detecting a DVD would sound very long to me.
>
> It's not for inserting DVDs, only for new devices showing up in the
> repository.
> Apparently new devices may keep on showing up a while after boot up,
> but I
> think this matters only for the kboot kernel, that's why I went with
> the
> exponential back-off with upper limit.
Why not just have a kthread poll at 2 second interval for new devices or
removed ones ?
(And not for request processing)
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [patch 4/7] ps3: Storage Driver Probing
Date: Sat, 26 May 2007 08:54:13 +1000 [thread overview]
Message-ID: <1180133653.19517.20.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.62.0705252143270.2657@pademelon.sonytel.be>
On Fri, 2007-05-25 at 21:48 +0200, Geert Uytterhoeven wrote:
> > > + msleep_interruptible(ms);
> > > + if (ms < 60000)
> > > + ms <<= 1;
> >
> > Is this timeout only for the disk spinup, or also for detecting
> media
> > added at run time, like inserting a DVD? One minute timeout for
> > detecting a DVD would sound very long to me.
>
> It's not for inserting DVDs, only for new devices showing up in the
> repository.
> Apparently new devices may keep on showing up a while after boot up,
> but I
> think this matters only for the kboot kernel, that's why I went with
> the
> exponential back-off with upper limit.
Why not just have a kthread poll at 2 second interval for new devices or
removed ones ?
(And not for request processing)
Ben.
next prev parent reply other threads:[~2007-05-25 22:54 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-25 8:36 [patch 0/7] RFC: PS3 Storage Drivers Geert.Uytterhoeven
2007-05-25 8:36 ` [patch 1/7] ps3: Preallocate bootmem memory for the PS3 FLASH ROM storage driver Geert.Uytterhoeven
2007-05-25 8:36 ` Geert.Uytterhoeven
2007-05-25 22:35 ` Benjamin Herrenschmidt
2007-05-26 8:51 ` Geert Uytterhoeven
2007-05-26 22:17 ` Benjamin Herrenschmidt
2007-05-27 18:24 ` Arnd Bergmann
2007-05-27 18:24 ` Arnd Bergmann
2007-05-25 8:36 ` [patch 2/7] ps3: Extract ps3_repository_find_bus() Geert.Uytterhoeven
2007-05-25 8:36 ` Geert.Uytterhoeven
2007-05-25 8:36 ` [patch 3/7] ps3: Storage Driver Core Geert.Uytterhoeven
2007-05-25 8:36 ` Geert.Uytterhoeven
2007-05-25 8:36 ` [patch 4/7] ps3: Storage Driver Probing Geert.Uytterhoeven
2007-05-25 8:36 ` Geert.Uytterhoeven
2007-05-25 16:18 ` Arnd Bergmann
2007-05-25 17:09 ` Geoff Levand
2007-05-25 17:09 ` Geoff Levand
2007-05-25 19:48 ` Geert Uytterhoeven
2007-05-25 22:54 ` Benjamin Herrenschmidt [this message]
2007-05-25 22:54 ` Benjamin Herrenschmidt
2007-05-25 22:47 ` Benjamin Herrenschmidt
2007-05-25 22:47 ` Benjamin Herrenschmidt
2007-05-26 8:56 ` Geert Uytterhoeven
2007-05-26 8:56 ` Geert Uytterhoeven
2007-05-25 8:36 ` [patch 5/7] ps3: Disk Storage Driver Geert.Uytterhoeven
2007-05-25 8:36 ` Geert.Uytterhoeven
2007-05-25 11:45 ` Olaf Hering
2007-05-25 19:43 ` Geert Uytterhoeven
2007-05-25 20:47 ` Olaf Hering
2007-05-25 16:26 ` Arnd Bergmann
2007-05-25 19:40 ` Geert Uytterhoeven
2007-05-25 20:43 ` Arnd Bergmann
2007-05-25 21:22 ` Geert Uytterhoeven
2007-05-25 22:45 ` Arnd Bergmann
2007-05-25 22:53 ` Benjamin Herrenschmidt
2007-05-25 22:53 ` Benjamin Herrenschmidt
2007-05-25 22:48 ` Benjamin Herrenschmidt
2007-05-25 22:48 ` Benjamin Herrenschmidt
2007-05-25 8:36 ` [patch 6/7] ps3: ROM " Geert.Uytterhoeven
2007-05-25 8:36 ` Geert.Uytterhoeven
2007-05-25 11:24 ` Olaf Hering
2007-05-25 22:45 ` Benjamin Herrenschmidt
2007-05-26 8:52 ` Geert Uytterhoeven
2007-05-26 8:52 ` Geert Uytterhoeven
2007-05-26 22:18 ` Benjamin Herrenschmidt
2007-05-26 22:18 ` Benjamin Herrenschmidt
2007-05-29 9:55 ` Christoph Hellwig
2007-05-25 16:50 ` Arnd Bergmann
2007-05-25 19:36 ` Geert Uytterhoeven
2007-05-25 21:04 ` Arnd Bergmann
2007-05-29 10:51 ` Christoph Hellwig
2007-05-29 10:51 ` Christoph Hellwig
2007-05-29 10:49 ` Christoph Hellwig
2007-05-29 11:11 ` Geert Uytterhoeven
2007-05-29 11:31 ` Benjamin Herrenschmidt
2007-05-29 11:31 ` Benjamin Herrenschmidt
2007-05-30 10:13 ` Christoph Hellwig
2007-05-30 10:13 ` Christoph Hellwig
2007-05-30 11:45 ` Benjamin Herrenschmidt
2007-05-30 11:45 ` Benjamin Herrenschmidt
2007-05-30 17:18 ` Geoff Levand
2007-05-30 17:18 ` Geoff Levand
2007-05-29 16:21 ` Geert Uytterhoeven
2007-05-30 10:01 ` Christoph Hellwig
2007-05-30 10:01 ` Christoph Hellwig
2007-05-25 8:36 ` [patch 7/7] ps3: FLASH " Geert.Uytterhoeven
2007-05-25 8:36 ` Geert.Uytterhoeven
2007-05-29 9:53 ` Christoph Hellwig
2007-05-29 9:57 ` Geert Uytterhoeven
2007-05-29 10:51 ` Christoph Hellwig
2007-05-29 10:51 ` Christoph Hellwig
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