Re: [Qemu-devel] [PATCH v13 5/6] raw-posix: Add full preallocation option

[Richard W.M. Jones]

On Thu, Sep 04, 2014 at 02:35:22PM +0200, Kevin Wolf wrote:
> Please change the code to always write zeros for FULL,

How is this useful for anyone?  You don't know if the underlying SAN
is going to detect these zeroes or combine these blocks together.
It's just slow for no reason.

Rich.

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