On Thu, Mar 22, 2018 at 02:06:24PM -0700, Michael Clark wrote: > On Mon, Mar 19, 2018 at 2:39 PM, Michael Clark <m...@sifive.com> wrote: > > On Mon, Mar 19, 2018 at 12:42 PM, Richard W.M. Jones <rjo...@redhat.com> > > wrote: > >> Did you see the problem with restoring floating point registers on > >> context switch? The test case is quite simple: > >> > >> http://oirase.annexia.org/tmp/sched.c > > > > No I didn't. Thanks. > From my local testing, it appears to only show up with SMP enabled. With 1 > CPU enabled the sched.c test passes. > I'll could try and revert this and see if it makes any difference... > however I think the float code has changed substantially with respect to > handling of flags. We could backport the more conservative approach of > handling MSTATUS_FS in the float routines. We should also run the test case > on hardware to rule out linux-kernel MSTATUS_FS bugs...
DJ, am I remembering correctly that you tried the test case on the HiFive evaluation board and it didn't demonstrate the bug? Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org
