On Fri, 2025-01-17 at 19:23 +0000, Michael Kelley wrote: > From: riel@xxxxxxxxxxx <riel@xxxxxxxxxxx> Sent: Wednesday, January > 15, 2025 6:30 PM > > > > - info = get_flush_tlb_info(NULL, start, end, 0, > > false, > > - TLB_GENERATION_INVALID); > > + guard(preempt)(); > > + > > + info = get_flush_tlb_info(NULL, start, end, PAGE_SHIFT, > > false, > > + TLB_GENERATION_INVALID); > > > > + if (end == TLB_FLUSH_ALL) > > This needs to test "info->end", not "end". > > In my VM on Hyper-V *without* INVLPGB support, the bug causes > boot to hang as it tries to individually flush each page in the > [0, TLB_FLUSH_ALL] range. :-) Ohhhh, good catch. I guess on bare metal the automatic tests that run on every kernel build didn't notice the slower boot, because it's not as severe of an impact as in a virtual machine. -- All Rights Reversed.
