From: Takashi Iwai <tiwai@suse.de>
To: Russell King <rmk+alsa@arm.linux.org.uk>
Cc: Jaroslav Kysela <perex@suse.cz>,
Alsa Devel list <alsa-devel@lists.sourceforge.net>
Subject: Re: [PATCH] 1/3 Implement generic device DMA mapping support
Date: Mon, 01 Mar 2004 19:44:59 +0100 [thread overview]
Message-ID: <s5hvflofluc.wl@alsa2.suse.de> (raw)
In-Reply-To: <s5hwu64fmb2.wl@alsa2.suse.de>
At Mon, 01 Mar 2004 19:34:57 +0100,
I wrote:
>
> at the initialization. when __get_free_pages() for 256MB with
> GFP_KERNEL is called, it goes to sleep and never gets back.
additional note: 256MB might be wrong but anyway it was a large
number. the driver tries to allocate as large buffers as possible at
the initialization.
but, the stall did happen even with much smaller sizes, when the
memory pages are fragmented. and, yes, it's logical that it happens
:)
anyway, that's why GFP_KERNEL was introduced only for allocation of a
single page in the old codes as a hack.
Takashi
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next prev parent reply other threads:[~2004-03-01 18:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-29 22:38 [PATCH] 1/3 Implement generic device DMA mapping support Russell King
2004-02-29 22:42 ` [PATCH] 2/3 " Russell King
2004-02-29 22:43 ` [PATCH] 3/3 " Russell King
2004-03-01 15:41 ` [PATCH] 1/3 " Takashi Iwai
2004-03-01 15:38 ` Jaroslav Kysela
2004-03-01 17:45 ` Russell King
2004-03-01 17:51 ` Takashi Iwai
2004-03-01 18:22 ` Russell King
2004-03-01 18:34 ` Takashi Iwai
2004-03-01 18:44 ` Takashi Iwai [this message]
2004-03-02 15:23 ` Takashi Iwai
2004-03-02 14:09 ` Takashi Iwai
2004-03-02 14:26 ` Russell King
2004-03-02 14:38 ` Takashi Iwai
2004-03-02 14:55 ` Russell King
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