linux-kernel - Re: [alsa-devel] [BUG] 3.10.[01] modprobe snd-... hangs

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Message-ID: <20130716214332.GA4139@pmhahn.de>
Date:	Tue, 16 Jul 2013 23:43:32 +0200
From:	Philipp Matthias Hahn <pmhahn@...ahn.de>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Rusty Russell <rusty@...tcorp.com.au>, alsa-devel@...a-project.org,
	Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lucas De Marchi <lucas.demarchi@...fusion.mobi>
Subject: Re: [alsa-devel] [BUG] 3.10.[01] modprobe snd-... hangs

Hello,

On Tue, Jul 16, 2013 at 12:29:38PM +0200, Takashi Iwai wrote:
> Could you check the patch below?  It makes the code path involving
> with request_module asynchronous.

With the patch applied all modules were loaded successfully: no hanging
modprobe processes anymore.

Thank you for your support.

...
> From: Takashi Iwai <tiwai@...e.de>
> Subject: [PATCH] ALSA: seq-oss: Initialize MIDI clients asynchronously
> 
> The recent report showed that the initial registration of OSS
> sequencer clients stuck at loading the sound modules, which involves
> with request_module() at the init phase.  As a workaround, call the
> registration part asynchronously.  (And, this is a better approache
> irrespective of the hang fix.)
> 
> Reported-by: Philipp Matthias Hahn <pmhahn@...ahn.de>
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Takashi Iwai <tiwai@...e.de>
> ---
>  sound/core/seq/oss/seq_oss_init.c | 16 +++++++++++++---
>  sound/core/seq/oss/seq_oss_midi.c |  2 +-
>  2 files changed, 14 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/core/seq/oss/seq_oss_init.c b/sound/core/seq/oss/seq_oss_init.c
> index e3cb46f..b3f39b5 100644

BYtE
Philipp
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 / /__/ / _ \/ // /\ \/ /
/____/_/_//_/\_,_/ /_/\_\ pmhahn@...ahn.de
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