linux-kernel - Re: Implementing NVMHCI...

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Message-ID: <49E46057.6000506@redhat.com>
Date:	Tue, 14 Apr 2009 13:07:19 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Szabolcs Szakacsits <szaka@...s-3g.com>,
	Grant Grundler <grundler@...gle.com>,
	Linux IDE mailing list <linux-ide@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: Implementing NVMHCI...

Andi Kleen wrote:
> Linus Torvalds <torvalds@...ux-foundation.org> writes:
>   
>> You absolutely do _not_ want to manage memory in 16kB chunks (or 64kB for 
>> your example!).
>>     
>
> AFAIK at least for user visible anonymous memory Windows uses 64k 
> chunks. At least that is what Cygwin's mmap exposes. I don't know
> if it does the same for disk cache.
>   

I think that's just the region address and size granularity (as in 
vmas).  For paging they still use the mmu page size.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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