From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Maximus <john.maximus@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: dma_alloc_coherent fails
Date: Fri, 1 Jun 2007 22:31:30 +0100 [thread overview]
Message-ID: <20070601213129.GC5400@flint.arm.linux.org.uk> (raw)
In-Reply-To: <3634de740706010946iabd6c51rf7e9a36463e3fca3@mail.gmail.com>
On Fri, Jun 01, 2007 at 10:16:41PM +0530, Maximus wrote:
> Hi,
> Am using a linux 2.6.19 kernel for arm. the dma_alloc_coherent
> function call in the kernel for 38400 bytes fails.
>
> Has anyone faced this problem before?.
>
> What could be make dma_alloc_coherent to success sometimes and fail
> sometimes?.
Memory fragmentation. Large allocations (> 1 page) are always unreliable.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
prev parent reply other threads:[~2007-06-01 21:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-01 16:46 dma_alloc_coherent fails Maximus
2007-06-01 21:31 ` Russell King [this message]
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