On Wed, 20 May 2015, Major Hayden wrote: > On 05/20/2015 05:41 AM, Jan Beulich wrote: > > Considering that no-one else is seeing this - is this perhaps connected > > to you building Xen with pre-release gcc 5.0.1? This is also because in > > order for the above to indeed occur, mmio_ro_do_page_fault()'s > > put_page() would need to drop the last reference of a page, yet > > page_get_owner_and_reference() doesn't obtain a reference when > > a page is unallocated (and hence unowned), i.e. normally a page > > would have a refcount of at least 2 here. Hence this would be > > possible only due to a race, but the exact same race to be observed > > on different hardware _and_ under an emulator is extremely unlikely.
You could try with the xen.gz file from https://copr-be.cloud.fedoraproject.org/results/myoung/xentest/fedora-21-x86_64/xen-4.5.1-0.rc1.fc21/xen-hypervisor-4.5.1-0.rc1.fc21.x86_64.rpm It is roughly the same version of xen but built against Fedora 21 and gcc 4.9.2. If that works then it probably is gcc 5. Michael Young _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
