The patch titled
Subject: mm, hwpoison: use num_poisoned_pages_sub() to decrease num_poisoned_pages
has been added to the -mm mm-unstable branch. Its filename is
mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm, hwpoison: use num_poisoned_pages_sub() to decrease num_poisoned_pages
Date: Tue, 30 Aug 2022 20:36:01 +0800
Use num_poisoned_pages_sub() to combine multiple atomic ops into one. Also
num_poisoned_pages_dec() can be killed as there's no caller now.
Link: https://lkml.kernel.org/r/20220830123604.25763-4-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/swapops.h | 5 -----
mm/memory-failure.c | 6 ++++--
2 files changed, 4 insertions(+), 7 deletions(-)
--- a/include/linux/swapops.h~mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages
+++ a/include/linux/swapops.h
@@ -602,11 +602,6 @@ static inline void num_poisoned_pages_in
atomic_long_inc(&num_poisoned_pages);
}
-static inline void num_poisoned_pages_dec(void)
-{
- atomic_long_dec(&num_poisoned_pages);
-}
-
static inline void num_poisoned_pages_sub(long i)
{
atomic_long_sub(i, &num_poisoned_pages);
--- a/mm/memory-failure.c~mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages
+++ a/mm/memory-failure.c
@@ -2596,7 +2596,7 @@ retry:
void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
{
- int i;
+ int i, total = 0;
/*
* A further optimization is to have per section refcounted
@@ -2609,8 +2609,10 @@ void clear_hwpoisoned_pages(struct page
for (i = 0; i < nr_pages; i++) {
if (PageHWPoison(&memmap[i])) {
- num_poisoned_pages_dec();
+ total++;
ClearPageHWPoison(&memmap[i]);
}
}
+ if (total)
+ num_poisoned_pages_sub(total);
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-page_alloc-minor-clean-up-for-memmap_init_compound.patch
hugetlb_cgroup-remove-unneeded-nr_pages-0-check.patch
hugetlb_cgroup-hugetlbfs-use-helper-macro-sz_1kmg.patch
hugetlb_cgroup-remove-unneeded-return-value.patch
hugetlb_cgroup-use-helper-macro-numa_no_node.patch
hugetlb_cgroup-use-helper-for_each_hstate-and-hstate_index.patch
mm-hugetlb-fix-incorrect-update-of-max_huge_pages.patch
mm-hugetlb-fix-warn_onkobj-in-sysfs_create_group.patch
mm-hugetlb-fix-missing-call-to-restore_reserve_on_error.patch
mm-hugetlb-fix-missing-call-to-restore_reserve_on_error-v2.patch
mm-hugetlb_vmemmap-add-missing-smp_wmb-before-set_pte_at.patch
mm-hugetlb-fix-sysfs-group-leak-in-hugetlb_unregister_node.patch
mm-hugetlb-make-detecting-shared-pte-more-reliable.patch
mm-hwpoison-fix-page-refcnt-leaking-in-try_memory_failure_hugetlb.patch
mm-hwpoison-fix-page-refcnt-leaking-in-unpoison_memory.patch
mm-hwpoison-fix-extra-put_page-in-soft_offline_page.patch
mm-hwpoison-fix-possible-use-after-free-in-mf_dax_kill_procs-v2.patch
mm-hwpoison-kill-procs-if-unmap-fails.patch
mm-hwpoison-kill-procs-if-unmap-fails-v2.patch
mm-hwpoison-avoid-trying-to-unpoison-reserved-page.patch
mm-hwpoison-use-clearpagehwpoison-in-memory_failure.patch
mm-hwpoison-use-__pagemovable-to-detect-non-lru-movable-pages.patch
mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages.patch
mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon.patch
mm-hwpoison-check-pagetable-explicitly-in-hwpoison_user_mappings.patch
mm-hwpoison-cleanup-some-obsolete-comments.patch
