[libvirt] [PATCH 2/2] Use posix_fallocate() to allocate disk space on supported systems

Daniel P. Berrange berrange at redhat.com
Thu Mar 19 10:41:50 UTC 2009

On Thu, Mar 19, 2009 at 12:45:25PM +0530, Amit Shah wrote:
> Make use of the safezero() function to allocate disk space instead
> of safewrite() to write zeros. The safezero() function will use
> posix_fallocate() on supported systems.
> If progress activity is not requested (current behaviour), the new
> safezero() function will allocate the file in one go.
> If progress activity is requested, allocate in 512MiB chunks.

ACK, this looks good, assuming we change the non-fallocate() safezero() 
impl to not allocate huge chunks of memory.  

The 'static int track_allocation_progress' is fine as you have it - it
is a useful reminder that we need to expose this functionality via the
API, and we can move it as needed at that time.

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