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Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_D


From: Avi Kivity
Subject: Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT)
Date: Wed, 21 May 2008 19:45:24 +0300
User-agent: Thunderbird 2.0.0.14 (X11/20080501)

Anthony Liguori wrote:

Actually, this is precisely what I'd like to do. The key is to mmap(MAP_PRIVATE) from the underling file directly into the guest's memory. Should be just as applicable to QEMU as KVM (although for KVM we need mmu-notifiers first).


mmap()ing a page at a time will generate a horribly long vma list. You need nonlinear mappings for this to be efficient.

--
error compiling committee.c: too many arguments to function





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