The quilt patch titled
Subject: mm-hold-ptl-from-the-first-pte-while-reclaiming-a-large-folio-fix
has been removed from the -mm tree. Its filename was
mm-hold-ptl-from-the-first-pte-while-reclaiming-a-large-folio-fix.patch
This patch was dropped because it was folded into mm-hold-ptl-from-the-first-pte-while-reclaiming-a-large-folio.patch
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-hold-ptl-from-the-first-pte-while-reclaiming-a-large-folio-fix
Date: Tue Mar 26 11:30:46 AM PDT 2024
rewrap comment, per Matthew
Cc: Barry Song <v-songbaohua@xxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
--- a/mm/vmscan.c~mm-hold-ptl-from-the-first-pte-while-reclaiming-a-large-folio-fix
+++ a/mm/vmscan.c
@@ -1258,14 +1258,16 @@ retry:
if (folio_test_pmd_mappable(folio))
flags |= TTU_SPLIT_HUGE_PMD;
/*
- * Without TTU_SYNC, try_to_unmap will only begin to hold PTL
- * from the first present PTE within a large folio. Some initial
- * PTEs might be skipped due to races with parallel PTE writes
- * in which PTEs can be cleared temporarily before being written
- * new present values. This will lead to a large folio is still
- * mapped while some subpages have been partially unmapped after
- * try_to_unmap; TTU_SYNC helps try_to_unmap acquire PTL from the
- * first PTE, eliminating the influence of temporary PTE values.
+ * Without TTU_SYNC, try_to_unmap will only begin to
+ * hold PTL from the first present PTE within a large
+ * folio. Some initial PTEs might be skipped due to
+ * races with parallel PTE writes in which PTEs can be
+ * cleared temporarily before being written new present
+ * values. This will lead to a large folio is still
+ * mapped while some subpages have been partially
+ * unmapped after try_to_unmap; TTU_SYNC helps
+ * try_to_unmap acquire PTL from the first PTE,
+ * eliminating the influence of temporary PTE values.
*/
if (folio_test_large(folio) && list_empty(&folio->_deferred_list))
flags |= TTU_SYNC;
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
mm-hold-ptl-from-the-first-pte-while-reclaiming-a-large-folio.patch
sh-remove-use-of-pg_arch_1-on-individual-pages-fix.patch
mm-gup-drop-folio_fast_pin_allowed-in-hugepd-processing-fix.patch
mm-allow-anon-exclusive-check-over-hugetlb-tail-pages-fix.patch
arm-mm-drop-vm_fault_badmap-vm_fault_badaccess-checkpatch-fixes.patch
mm-hugetlb-rename-dissolve_free_huge_pages-to-dissolve_free_hugetlb_folios-fix.patch
__mod_memcg_lruvec_state-enhance-diagnostics.patch
__mod_memcg_lruvec_state-enhance-diagnostics-fix.patch
binfmt_elf_fdpic-fix-proc-pid-auxv-checkpatch-fixes.patch
