Hi, I updated the unpoison patchset based ou discussions over v2. Please see individual patches for details of updates. ----- (cover letter copied from v2) ----- Main purpose of this series is to sync unpoison code to recent changes around how hwpoison code takes page refcount. Unpoison should work or simply fail (without crash) if impossible. The recent works of keeping hwpoison pages in shmem pagecache introduce a new state of hwpoisoned pages, but unpoison for such pages is not supported yet with this series. It seems that soft-offline and unpoison can be used as general purpose page offline/online mechanism (not in the context of memory error). I think that we need some additional works to realize it because currently soft-offline and unpoison are assumed not to happen so frequently (print out too many messages for aggressive usecases). But anyway this could be another interesting next topic. v1: https://lore.kernel.org/linux-mm/20210614021212.223326-1-nao.horiguchi@xxxxxxxxx/ v2: https://lore.kernel.org/linux-mm/20211025230503.2650970-1-naoya.horiguchi@xxxxxxxxx/ Thanks, Naoya Horiguchi --- Summary: Naoya Horiguchi (3): mm/hwpoison: mf_mutex for soft offline and unpoison mm/hwpoison: remove MF_MSG_BUDDY_2ND and MF_MSG_POISONED_HUGE mm/hwpoison: fix unpoison_memory() include/linux/mm.h | 3 +- include/linux/page-flags.h | 4 ++ include/ras/ras_event.h | 2 - mm/memory-failure.c | 169 ++++++++++++++++++++++++++++----------------- mm/page_alloc.c | 23 ++++++ 5 files changed, 133 insertions(+), 68 deletions(-)
