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 :| -- Libvir-list mailing list Libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list