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[v5,7/7] doc: proc: fix the description to THPeligible

Message ID 20220616174840.1202070-8-shy828301@gmail.com (mailing list archive)
State New
Headers show
Series Cleanup transhuge_xxx helpers | expand

Commit Message

Yang Shi June 16, 2022, 5:48 p.m. UTC 
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.

Reviewed-by: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Yang Shi <shy828301@gmail.com>
---
 Documentation/filesystems/proc.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index 1bc91fb8c321..a5e41e636a1a 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -514,8 +514,10 @@  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