On Mon, Mar 19, 2018 at 11:35:51AM -0700, Michael Clark wrote: > The RISC-V post-merge spec conformance and cleanup series has had a lot of > testing. I've been using it to compile QEMU inside of QEMU using the RISC-V > Fedora Image and its native RISC-V GCC toolchain running inside SMP Linux > 4.16-rc2. It appears to be pretty rock-solid. The rcu lock fix would likely > only affect users who are ballooning memory while a guest is under load. > The page walker changes have also been tested under load (including > performance tests).
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 Note you must compile it with gcc -O2 to manifest the bug. (We originally thought it was a problem with gcc's optimization, but it isn't.) In Fedora's qemu tree are carrying the following patch which is just a workaround: https://github.com/rwmjones/fedora-riscv-bootstrap/blob/master/stage1-riscv-qemu/force-float-save.patch 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
