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

[Anthony Liguori]

Laurent Vivier wrote:
> BTW, patch #1 is a clean-up (no change, only code move) and patch #2
> doesn't align buffer, but try to minimise syscall (it improves
> performance with O_DSYNC too).
>
> Ignore patch #3 and #4 if you dislike them.
>   

But how useful is #1 and #2 if the buffers aren't aligned and we're 
hitting the slow path?

Regards,

Anthony Liguori

> Regards,
> Laurent
>