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docs: mm: fix the incorrect 'FileHugeMapped' field
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>
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@ -436,7 +436,7 @@ AnonHugePmdMapped).
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The number of file transparent huge pages mapped to userspace is available
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The number of file transparent huge pages mapped to userspace is available
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by reading ShmemPmdMapped and ShmemHugePages fields in ``/proc/meminfo``.
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by reading ShmemPmdMapped and ShmemHugePages fields in ``/proc/meminfo``.
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To identify what applications are mapping file transparent huge pages, it
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To identify what applications are mapping file transparent huge pages, it
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is necessary to read ``/proc/PID/smaps`` and count the FileHugeMapped fields
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is necessary to read ``/proc/PID/smaps`` and count the FilePmdMapped fields
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for each mapping.
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for each mapping.
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Note that reading the smaps file is expensive and reading it
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Note that reading the smaps file is expensive and reading it
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