From: Sergej Pupykin <ps@lx-ltd.ru>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Bugs in usb-skeleton.c??? :)
Date: 13 Jul 2006 17:10:20 +0400 [thread overview]
Message-ID: <m364i17irn.fsf@lx-ltd.ru> (raw)
In-Reply-To: <1152795650.3024.44.camel@laptopd505.fenrus.org>
>> Does kmalloc always allocate pages that can be used in DMA?
AvdV> normally yes. HOWEVER....
I use sh4 cpu...
AvdV> ..it is nicer to use the DMA allocation API (which internally may fall
AvdV> back to kmalloc etc), while kmalloc may work, it can be quite slow in
AvdV> how it's made to work. So it's just nicer to just use the DMA memory
AvdV> allocators... (see Documentation/DMA-API.txt file for a description of
AvdV> this)
Thanks, I'll try it.
next prev parent reply other threads:[~2006-07-13 13:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-13 11:26 Bugs in usb-skeleton.c??? :) Sergej Pupykin
2006-07-13 11:58 ` Arjan van de Ven
2006-07-13 12:33 ` Sergej Pupykin
2006-07-13 13:00 ` Arjan van de Ven
2006-07-13 13:10 ` Sergej Pupykin [this message]
2006-07-13 14:24 ` Manuel Lauss
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