On 8/21/22 16:31, Andrew Morton wrote:
On Sun, 21 Aug 2022 16:18:48 -0700 John Hubbard <jhubbard@xxxxxxxxxx> wrote:vmas[] array. We haven't messed with gup.c much this time around - just one patch from Alistair ("mm/gup.c: simplify and fix check_and_migrate_movable_pages() return codes"). It does touch this area, but I can't immediately see how it could newly cause this.Neither can I, even after looking at both of these recent commits to gup.c in this branch: commit 4d1225cd5560 ("mm/gup.c: simplify and fix check_and_migrate_movable_pages() return codes") commit 0e5d6dac6b65 ("mm/gup: fix FOLL_FORCE COW security issue and remove FOLL_COW") As you say, a bisection would really help here.Might https://lkml.kernel.org/r/20220821183547.950370-1-syoshida@xxxxxxxxxx save us?
aha yes, that looks right. thanks, -- John Hubbard NVIDIA
