Re: [Qemu-devel] [PATCH 0/4] qcow2: Improve cluster refcount update

[Laurent Vivier]

Le vendredi 07 novembre 2008 à 09:37 -0600, Anthony Liguori a écrit :
> Laurent Vivier wrote:
> > Le vendredi 07 novembre 2008 à 07:59 -0600, Anthony Liguori a écrit :
> >   
> > In all cases #1 is totally useless as it is only cosmetic.
> >
> > #2 improves performance without aligned buffers and with "cache" set to
> > default value.
> >   
> 
> I'm currently rewriting the block-raw-posix.c O_DIRECT support.  I'll 
> commit your patches once I finish that.
> 
> I'm switching everything to use the aio functions, introducing a memory 
> pool so that we can efficiently allocate memory for new requests without 
> having unbounded memory allocation, and switching all the synchronous 
> functions to use the aio functions.

OK, I'll repost the patch when your work will be done.
[to correct bugs reported by Kevin]

Regards,
Laurent
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