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authorYang Shi <shy828301@gmail.com>2022-06-16 20:48:40 +0300
committerakpm <akpm@linux-foundation.org>2022-07-18 03:14:33 +0300
commitcb55b83862647da3fbe4135de1723fa78e2357a3 (patch)
treeb8c1c91b05068fabbf2bd5fee1ea30c9e62b7caa /Documentation/filesystems/proc.rst
parent1064026bab9f011bdea1251d44d66bbbcee04f6e (diff)
downloadlinux-cb55b83862647da3fbe4135de1723fa78e2357a3.tar.xz
doc: proc: fix the description to THPeligible
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 explicitly to avoid ambiguity. Link: https://lkml.kernel.org/r/20220616174840.1202070-8-shy828301@gmail.com Signed-off-by: Yang Shi <shy828301@gmail.com> Reviewed-by: Zach O'Keefe <zokeefe@google.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Documentation/filesystems/proc.rst')
-rw-r--r--Documentation/filesystems/proc.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index 0b5120ff506c..e7aafc82be99 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -517,8 +517,10 @@ replaced by copy-on-write) part of the underlying shmem object out on swap.
"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