Re: [Qemu-devel] [PATCH 0/2] osdep: warn if open(O_DIRECT) on fails with EINVAL

[Stefan Hajnoczi]

On Thu, Aug 22, 2013 at 11:29:01AM +0200, Stefan Hajnoczi wrote:
> After trying out a few approaches, here is what I think is the simplest viable
> way to print a user-friendly warning if opening a file O_DIRECT fails with
> EINVAL.  This happens on Linux tmpfs.
> 
> We don't really know why we got EINVAL but if O_DIRECT was used it's a good
> clue that the file system does not support O_DIRECT.
> 
> Stefan Hajnoczi (2):
>   libcacard: link against qemu-error.o for error_report()
>   osdep: warn if open(O_DIRECT) on fails with EINVAL
> 
>  libcacard/Makefile | 3 ++-
>  util/osdep.c       | 7 +++++++
>  2 files changed, 9 insertions(+), 1 deletion(-)

Applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan