Re: [libvirt] v3: Use posix_fallocate() on supported systems to allocate diskspace

On (Thu) Mar 19 2009 [20:17:52], Amit Shah wrote: > This patchset makes use of the posix_fallocate() call to allocate > chunks of files whenever needed if it's available. > > We fallback to using safewrite() if it's not available. > > mmap() could be used instead of safewrite too; I have a patch in case > someone is interested in seeing it. Something like this: >From d33b843b381ea6a25c6e8efb6b248965a40e5f84 Mon Sep 17 00:00:00 2001 From: Amit Shah <amit.shah(a)redhat.com&gt; Date: Thu, 19 Mar 2009 21:43:50 +0530 Subject: [PATCH] Use mmap() and memset() for safezero If available, use mmap to allocate zeroed chunks for files. This should be faster than allocating small chunks using safewrite. Signed-off-by: Amit Shah <amit.shah(a)redhat.com&gt;