The patch titled
Subject: doc: proc: fix the description to THPeligible
has been added to the -mm mm-unstable branch. Its filename is
doc-proc-fix-the-description-to-thpeligible.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/doc-proc-fix-the-description-to-thpeligible.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Yang Shi <shy828301@xxxxxxxxx>
Subject: doc: proc: fix the description to THPeligible
Date: Wed, 15 Jun 2022 10:29:26 -0700
The THPeligible bit shows 1 if and only if the VMA is eligible for
allocating THP and the THP is also PMD mappable. Some misaligned file
VMAs may be eligible for allocating THP but the THP can't be mapped by
PMD. Make this more explictly to avoid ambiguity.
Link: https://lkml.kernel.org/r/20220615172926.546974-8-shy828301@xxxxxxxxx
Signed-off-by: Yang Shi <shy828301@xxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Zach O'Keefe <zokeefe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/filesystems/proc.rst | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/Documentation/filesystems/proc.rst~doc-proc-fix-the-description-to-thpeligible
+++ a/Documentation/filesystems/proc.rst
@@ -514,8 +514,10 @@ replaced by copy-on-write) part of the u
"SwapPss" shows proportional swap share of this mapping. Unlike "Swap", this
does not take into account swapped out page of underlying shmem objects.
"Locked" indicates whether the mapping is locked in memory or not.
+
"THPeligible" indicates whether the mapping is eligible for allocating THP
-pages - 1 if true, 0 otherwise. It just shows the current status.
+pages as well as the THP is PMD mappable or not - 1 if true, 0 otherwise.
+It just shows the current status.
"VmFlags" field deserves a separate description. This member represents the
kernel flags associated with the particular virtual memory area in two letter
_
Patches currently in -mm which might be from shy828301@xxxxxxxxx are
mm-rmap-use-the-correct-parameter-name-for-define_page_vma_walk.patch
mm-pvmw-check-possible-huge-pmd-map-by-transhuge_vma_suitable.patch
mm-khugepaged-check-thp-flag-in-hugepage_vma_check.patch
mm-thp-consolidate-vma-size-check-to-transhuge_vma_suitable.patch
mm-khugepaged-better-comments-for-anon-vma-check-in-hugepage_vma_revalidate.patch
mm-thp-kill-transparent_hugepage_active.patch
mm-thp-kill-__transhuge_page_enabled.patch
mm-khugepaged-reorg-some-khugepaged-helpers.patch
doc-proc-fix-the-description-to-thpeligible.patch
