[dpdk-dev] [PATCH] doc: add known issue for virtio TSO with clones
Thomas Monjalon
thomas.monjalon at 6wind.com
Thu Feb 9 16:05:05 CET 2017
2017-02-06 15:10, Stephen Hemminger:
> On Mon, 6 Feb 2017 14:16:53 +0100
> Olivier Matz <olivier.matz at 6wind.com> wrote:
>
> > +**Implication**:
> > + In this situation, the shared data will be modified by the driver,
> > + potentially causing race conditions with the other users of the mbuf
> > + data.
>
> This is a driver bug! The driver must check for refcount and not modify
> mbuf's whose refcnt > 1. For those mbuf's it should copy the mbuf and modify
> the copy.
>
> It is not good to force buggy refcnt handling back onto the application.
> It is acceptable to document the performance impact.
Everybody agree it is a bug.
Unfortunately, nobody has time to work on it in this release.
So it is better than nothing to document the bug.
Applied, thanks
More information about the dev
mailing list