On Mon, Nov 30, 2020 at 12:51:59PM +0100, Vlastimil Babka wrote: > On 11/30/20 11:37 AM, Mohamed Alzayat wrote: > > Thanks for confirming, Vlastimil! > > > > The first bad commit is: 0758cd8304942292e95a0f750c374533db378b32 > > asm-generic/tlb: avoid potential double flush > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0758cd8304942292e95a0f750c374533db378b32 > > > > Reverting this commit solves the problem, but this might not be the > > right way of fixing it. > > Thanks for bisecting! Let's CC people involved in that commit. All important > should be in the quoted conversation above. There's a thread about it here: https://lkml.kernel.org/r/20201120143557.6715-1-will@xxxxxxxxxx That softdirty code really shouldn't be using mmu_gather imo, but I'm still not clear on what exactly is broken why there.
