On Wed, Mar 14, 2018 at 10:11:00PM +0200, Leon Romanovsky wrote:
> On Wed, Mar 14, 2018 at 01:56:43PM -0600, Jason Gunthorpe wrote:
> > On Wed, Mar 14, 2018 at 03:53:02PM -0400, Doug Ledford wrote:
> > > On Thu, 2018-03-08 at 19:00 +0200, Leon Romanovsky wrote:
> > > > rom: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> > > >
> > > > In commit 357d23c811a7 ("Remove the obsolete libibcm library")
> > > > in rdma-core [1], we removed obsolete library which used the
> > > > /dev/infiniband/ucmX interface. As it can be seen from
> > > > the discussion in that PR, all major distributions dropped
> > > > that library long time ago.
> > >
> > > Correction. The library wasn't dropped (by Red Hat anyway), we just
> > > didn't use it ourselves (meaning it was not used by any software that we
> > > shipped, but we still shipped it in case someone's out of box software
> > > used it). We didn't drop it until rdma-core dropped it. I'm not sure
> > > we can take this patch yet as the kernel should maintain backward
> > > compatibility with older apps using the old library for at least some
> > > period of time.
> >
> > I think the concern is that if we were to run syzkaller on it then it
> > will have lots of bad bugs..
>
> There is no need to run syzkaller to see bugs there, almost all found in
> RDMA-CM and UCMA is applicable for UCM.
>
> >
> > Who is going to spend time to fix an obsolete API? :(
>
> Right, it is my personal position and not official, but I think that
> Mellanox won't contribute any effort in fixing UCM.
Doug,
What is resolution?
Thanks
>
> Thanks
>
> >
> > Jason
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