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docs: mm: fix the incorrect 'FileHugeMapped' field

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The '/proc/PID/smaps' does not have the 'FileHugeMapped' field to count
the file transparent huge pages, instead, the 'FilePmdMapped' field should
be used.  Fix it.

Link: https://lkml.kernel.org/r/d520ce3aba2b03b088be30bece732426a939049a.1734425264.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baolin Wang 2024-12-17 16:55:39 +08:00 committed by Andrew Morton
parent 05981da4bc
commit a1d72b2183
1 changed files with 1 additions and 1 deletions
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2
Documentation/admin-guide/mm/transhuge.rst
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@ -436,7 +436,7 @@ AnonHugePmdMapped).
The number of file transparent huge pages mapped to userspace is available
by reading ShmemPmdMapped and ShmemHugePages fields in ``/proc/meminfo``.
To identify what applications are mapping file transparent huge pages, it
is necessary to read ``/proc/PID/smaps`` and count the FileHugeMapped fields
is necessary to read ``/proc/PID/smaps`` and count the FilePmdMapped fields
for each mapping.
Note that reading the smaps file is expensive and reading it