On Tue, 2025-08-12 at 18:43 +0200, John Paul Adrian Glaubitz wrote: > I suspect that the main issue is to be found in the following patch which > introduced VM_FLUSH_RESET_PERMS > which may not work as expected on sun4u SPARC systems:
I think the problem we found with VM_FLUSH_RESET_PERMS was that the sparc64 kernel TLB flush implementation was broken. Since VM_FLUSH_RESET_PERMS caused kernel TLB flushes to happen sooner, it just showed up sooner. [0] This other issue seems to be about userspace memory. So I wonder if these are two separate issues? Bisecting to the original VM_FLUSH_RESET_PERMS would have had the known sparc kernel range TLB flush issue. So to bisect the other issue you might need to apply this [1]. [0] https://marc.info/?l=linux-sparc&m=155915694304118&w=2 [1] https://lore.kernel.org/all/57385aab-c9a1-46ad-b743-445d4ecca...@jrtc27.com/
