Dan Horák <d...@danny.cz> writes: > Hi all, > > we have been struggling with an issue in the bdwgc project (garbage > collector) on P9 systems for a while [1]. There were some test failing > on P9, but not on P8 or other platforms (x86, s390x, aarch64). Recently > the upstream developer has found out there is likely a problem in the > kernel memory mgmt [2], there is a reproduction scenario included. I > have rechecked the original code on P9 with hash MMU and it worked. Thus > I believe there is a problem in the radix MMU code on Power, where it > behaves differently. My testing was using Fedora, which means recent > kernels up to 6.4-rc1. > > [1] https://github.com/ivmai/bdwgc/issues/479 > [2] https://github.com/ivmai/bdwgc/issues/479#issuecomment-1535274481
Thanks Dan. Fix patch here: https://lore.kernel.org/linuxppc-dev/20230511114224.977423-1-...@ellerman.id.au/ I tested that it fixes the bdwgc failures (with their workaround reverted). cheers
