From: Arjan van de Ven <arjan@infradead.org>
To: erich <erich@areca.com.tw>
Cc: "\"\"Christoph Hellwig\"\"" <hch@infradead.org>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
billion.wu@areca.com.tw, alan@lxorguk.ukuu.org.uk, akpm@osdl.org,
oliver@neukum.org
Subject: Re: Areca RAID driver remaining items?
Date: Thu, 23 Feb 2006 13:07:32 +0100 [thread overview]
Message-ID: <1140696452.4672.43.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <005a01c6386f$84b30d50$b100a8c0@erich2003>
On Thu, 2006-02-23 at 19:51 +0800, erich wrote:
> If Linux can not assurent the contingous memory space allocating of
> "dma_alloc_coherent" .
coherent memory is guaranteed to be in the "lower" 32 bit of memory!
So that is good news, I think you are just fine.
[Exception is that you can say that you are ok with a bigger mask for
this type of memory, but just don't do that if you're not]
> When arcmsr get a physical ccb address from areca's firmware.
> Does linux has any functions for converting of "bus to virtual" ?
not without using pools. You would have to search the list of memory you
gave it to find that out.
(USB has a similar problem, afaik they solved it with pools)
next prev parent reply other threads:[~2006-02-23 12:07 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-20 18:02 Dax Kelson
2006-02-20 18:11 ` Arjan van de Ven
2006-02-20 18:20 ` Christoph Hellwig
2006-02-22 6:27 ` erich
2006-02-22 14:57 ` Christoph Hellwig
2006-02-23 6:27 ` erich
2006-02-23 8:25 ` Arjan van de Ven
2006-02-23 9:50 ` erich
2006-02-23 9:56 ` Arjan van de Ven
2006-02-23 11:51 ` erich
2006-02-23 12:07 ` Arjan van de Ven [this message]
2006-02-24 2:08 ` erich
2006-02-24 8:50 ` Arjan van de Ven
2006-02-23 11:59 ` Alan Cox
2006-02-24 2:36 ` erich
2006-02-24 16:56 ` Christoph Hellwig
2006-02-24 17:03 ` Randy.Dunlap
2006-02-24 19:38 ` Matthew Wilcox
2006-02-24 20:14 ` Randy.Dunlap
2006-02-26 6:41 ` Randy.Dunlap
2006-02-26 16:02 ` Matthew Wilcox
2006-02-26 19:00 ` Randy.Dunlap
2006-02-24 3:18 erich
2006-02-27 11:27 erich
2006-02-27 12:36 ` Matthew Wilcox
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