patches/old/mm-shmem-add-mthp-counters-for-anonymous-shmem-fix.patch

From: Baolin Wang <baolin.wang@linux.alibaba.com>
Subject: mm-shmem-add-mthp-counters-for-anonymous-shmem-fix
Date: Thu, 13 Jun 2024 09:08:37 +0800

update Documentation/admin-guide/mm/transhuge.rst

Link: https://lkml.kernel.org/r/d86e2e7f-4141-432b-b2ba-c6691f36ef0b@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <v-songbaohua@oppo.com>
Cc: Daniel Gomez <da.gomez@samsung.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Lance Yang <ioworker0@gmail.com>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/admin-guide/mm/transhuge.rst |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/Documentation/admin-guide/mm/transhuge.rst~mm-shmem-add-mthp-counters-for-anonymous-shmem-fix
+++ a/Documentation/admin-guide/mm/transhuge.rst
@@ -501,6 +501,19 @@ swpout_fallback
 	Usually because failed to allocate some continuous swap space
 	for the huge page.
 
+file_alloc
+	is incremented every time a file huge page is successfully
+	allocated.
+
+file_fallback
+	is incremented if a file huge page is attempted to be allocated
+	but fails and instead falls back to using small pages.
+
+file_fallback_charge
+	is incremented if a file huge page cannot be charged and instead
+	falls back to using small pages even though the allocation was
+	successful.
+
 As the system ages, allocating huge pages may be expensive as the
 system uses memory compaction to copy data around memory to free a
 huge page for use. There are some counters in ``/proc/vmstat`` to help
_