From: Artem Bityutskiy <dedekind1@gmail.com>
To: George Pontis <GPontis@z9.com>
Cc: linux-mtd@lists.infradead.org
Subject: Re: atmel_nand, DMA, and "Fall back to CPU I/O"
Date: Wed, 02 May 2012 14:53:39 +0300 [thread overview]
Message-ID: <1335959619.10293.41.camel@sauron.fi.intel.com> (raw)
In-Reply-To: <037801cd2330$0cd747d0$2685d770$@com>
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On Wed, 2012-04-25 at 15:09 -0700, George Pontis wrote:
> Working with 3.0.13 kernel and the at91sam9g45, 8b NAND flash with rootfs in
> NAND
>
> At boot, the kernel shows 22 DMA warnings, then another 260 as UBIFS mounts
> the root FS:
>
> atmel_nand atmel_nand: Fall back to CPU I/O
>
Unfortunately UBI and UBIFS use vmalloced memory for I/O and many people
yelled but no one cared to fix this. I think we should make UBI/UBIFS to
use kmalloc()'ed memory instead.
--
Best Regards,
Artem Bityutskiy
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next prev parent reply other threads:[~2012-05-02 11:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-25 22:09 atmel_nand, DMA, and "Fall back to CPU I/O" George Pontis
2012-05-02 11:53 ` Artem Bityutskiy [this message]
2012-05-02 19:32 ` Brian Norris
2012-05-03 10:35 ` Artem Bityutskiy
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