On Thu, Mar 19, 2009 at 08:17:53PM +0530, Amit Shah wrote:
Using posix_fallocate() to allocate disk space and fill it with zeros is faster than writing the zeros block-by-block.
Also, for backing file systems that support extents and the fallocate() syscall, this operation will give us a big speed boost.
This also brings us the advantage of very less fragmentation for the chunk being allocated.
For systems that don't support posix_fallocate(), fall back to safewrite().
ACK, looks good now. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|