Recover from poison consumption while copying pages in the kernel for a copy-on-write fault. Changes since v3: 1) Miaohe Lin <linmiaohe@xxxxxxxxxx> pointed out that a recent change by Alexander Potapenko <glider@xxxxxxxxxx> to copy_user_highpage() added a call to kmsan_unpoison_memory(). Same is needed in my cloned copy_mc_user_highpage() ... at least in the successful case where the page was copied with no machine checks. 2) Picked up some additional Reviewed-by and Tested-by tags. Tony Luck (2): mm, hwpoison: Try to recover from copy-on write faults mm, hwpoison: When copy-on-write hits poison, take page offline include/linux/highmem.h | 26 ++++++++++++++++++++++++++ include/linux/mm.h | 5 ++++- mm/memory.c | 32 ++++++++++++++++++++++---------- 3 files changed, 52 insertions(+), 11 deletions(-) base-commit: 30a0b95b1335e12efef89dd78518ed3e4a71a763 -- 2.37.3
