From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: "Daniel Jacques (Alten)" <jacques.daniel@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] rt_heap and DMA32 zone
Date: Tue, 19 Oct 2010 12:22:58 +0200 [thread overview]
Message-ID: <4CBD7182.2050500@domain.hid> (raw)
In-Reply-To: <DF9F3A3C150B0646A17FF1487C1B6D5E0380C01F@rennsmail06.eu.thmulti.com>
Daniel Jacques (Alten) wrote:
> Hi,
>
> I noticed some allocation failure using kmalloc in case of GFP_DMA32 with big size, even if I modified the CONFIG_FORCE_MAX_ZONEORDER to be coherent with my max size (32MB).
> I don't know the reason of this failure. I am interesting by any idea about this point ...
> Meanwhile, to avoid this trouble I performed the following additional patch in ksrc/nucleus/heap.c to force using of __get_free_pages instead of kmalloc in case of GFP_DMA32 flag.
> Jacques
At this point, the problem seems to be in linux code. So, there should
be no need to modify xenomai code. Are you sure that kmalloc does not
fail due to fragmentation?
--
Gilles.
next prev parent reply other threads:[~2010-10-19 10:22 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <DF9F3A3C150B0646A17FF1487C1B6D5E0380C00C@rennsmail06.eu.thmulti.com>
2010-10-13 7:58 ` [Xenomai-help] rt_heap and DMA32 zone Daniel Jacques (Alten)
2010-10-13 9:36 ` Gilles Chanteperdrix
2010-10-13 10:07 ` Daniel Jacques (Alten)
2010-10-13 12:36 ` Gilles Chanteperdrix
2010-10-13 13:51 ` Daniel Jacques (Alten)
2010-10-13 14:07 ` Gilles Chanteperdrix
2010-10-13 14:18 ` Gilles Chanteperdrix
2010-10-13 14:31 ` Daniel Jacques (Alten)
2010-10-14 22:29 ` Gilles Chanteperdrix
2010-10-19 9:37 ` Daniel Jacques (Alten)
2010-10-19 10:22 ` Gilles Chanteperdrix [this message]
2010-10-19 10:52 ` Anders Blomdell
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