Re: [Qemu-devel] [PATCH 1/5] block: Virtual Bridges VERDE GOW disk image format documentation

[Christoph Hellwig]

On Sun, Mar 11, 2012 at 04:03:01PM -0500, Leonardo E. Reiter wrote:
> indeed mmap() is used in the code.  This is unfortunate that it cannot be
> used.  It's a really high performance way to achieve what we want here, and
> very safe for the use-case.  Of course the only medium we support in the
> product that uses this is filesystem, so I see your point.  I'll see about
> using some different mechanism.

using shared writeable mmaps for disk I/O is never a safe approach, as
there is no way for sane error handling.