public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: "Thomas Bächler" <thomas@archlinux.org>
To: Arjan van de Ven <arjan@infradead.org>
Cc: "Thomas Bächler" <thomas@archlinux.org>, linux-kernel@vger.kernel.org
Subject: Re: fastboot/async and initramfs: How am I supposed to know when devices are finished initializing?
Date: Sun, 29 Mar 2009 19:23:15 +0200	[thread overview]
Message-ID: <49CFAE83.5080700@archlinux.org> (raw)
In-Reply-To: <20090329094220.4e80c267@infradead.org>

[-- Attachment #1: Type: text/plain, Size: 1015 bytes --]

Arjan van de Ven schrieb:
>> Thanks, I will integrate that into our initramfs. Will that also work 
>> for USB mass storage (which was already problematic with older
>> kernels, you load the module you don't know how long it takes until
>> the sdX devices are created)?
> 
> in part.
> 
> The problem with USB probing is that devices come online whenever they
> feel like it; there is no way to wait for that.

Yes, that is a problem when trying to make bootable USB pen drives.

>> Can I load that module before loading the actual SCSI/SATA/PATA
>> driver?
> 
> it's the loading of the driver that causes the wait. Not the act
> of having the driver loaded.
> 
> so the way to wait for things to settle is to load the driver...
> 
> ... I take it the answer to your question is "no". Yes you can load it
> earlier, but no it has no effect. You can however load/unload it
> multiple times.

I understand the logic now, works as expected on my machine. Many thanks 
for your quick help.


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 260 bytes --]

      parent reply	other threads:[~2009-03-29 17:23 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-29 16:02 fastboot/async and initramfs: How am I supposed to know when devices are finished initializing? Thomas Bächler
2009-03-29 16:11 ` Arjan van de Ven
2009-03-29 16:39   ` Thomas Bächler
2009-03-29 17:36     ` Kay Sievers
2009-03-29 17:52       ` Thomas Bächler
2009-03-29 18:06         ` Kay Sievers
2009-03-30 18:23           ` Dan Williams
2009-03-30 18:42             ` Kay Sievers
2009-03-30 19:08               ` Dan Williams
2009-03-29 20:03         ` fastboot/async and initramfs: How am I supposed to know when?devices " Alexander Clouter
2009-03-30 20:20           ` Thomas Bächler
     [not found]   ` <49CFA2CC.9080506@archlinux.org>
     [not found]     ` <20090329094220.4e80c267@infradead.org>
2009-03-29 17:23       ` Thomas Bächler [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=49CFAE83.5080700@archlinux.org \
    --to=thomas@archlinux.org \
    --cc=arjan@infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox