Re: [libvirt] [PATCH] virfile: safezero: fall back to writing block by block if mmap fails

mmap can fail on 32-bit systems if we're trying to zero out a lot of data. Fall back to using block-by-block writing in that case. While we could map smaller blocks it's unlikely that this code is used a lot and its easier to just fall back to one of the existing methods. Also modified the block-by-block zeroing to not allocate a megabyte of zeroes if we're writing less than that. Signed-off-by: Oskari Saarenmaa <os(a)ohmu.fi&gt; --- src/util/virfile.c | 34 ++++++++++++++-------------------- 1 file changed, 14 insertions(+), 20 deletions(-)