On Thu, 25 Feb 2016, Huacai Chen wrote: > I *do* have answered your quesition, which you can see here: > https://patchwork.linux-mips.org/patch/12240/ > > When unaligned access triggered, do_ade() will access user address > with EXL=1, and that may trigger tlb refill. Thank you and I can see your original answer as well, which would need to go into the patch description itself, however it is too vague for me I'm afraid. Unaligned accesses have been likewise handled since forever and no one else has hit an issue with `do_ade' making user accesses with EXL=1, as this handler is only called once KMODE has cleared EXL. So please explain us the scenario in which it doesn't happen and you still have EXL=1 in `do_ade'. What the conditions for this to be the case? Without a further explanation it looks like a bug elsewhere to me, which needs to be treated accordingly there, rather than by complicating TLB handlers. Maciej
