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Howlett" , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Shuah Khan Subject: [PATCH 8/8] mm: Documentation: clarify where the mTHP stats live Date: Mon, 6 Jul 2026 09:44:55 -0600 Message-ID: <20260706154500.39178-9-npache@redhat.com> In-Reply-To: <20260706154500.39178-1-npache@redhat.com> References: <20260706154500.39178-1-npache@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-MFC-PROC-ID: bCGJlbgcZDqwYzLp6oTc7S3rEOrs-6c52taes1XA6jI_1783352722 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-Stat-Signature: ece15s831dr7eurw6afm8dqsa3nwt6fh X-Rspamd-Queue-Id: 2EF2740003 X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1783352731-904512 X-HE-Meta: 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 StWMgW6T /v2maZdbtY4qVHElLNT8FQBGcRd4oO0wPu/Lr3ULzE1WbMZMkE2fyGd4FNFEJX3u1mpTlz2LGIoedbruy6/kfeeVnWlRKzBjefmGrL7m74qNputN2/73ulZ66QZaDqWkKeiQP4TYrjrGDLUZfTFcUJBV9OzxhHyWRc0YgQ72ba8YLhYX988qSBUJdTXV4rR8XSDJ37BFPh25F2+WCZObHs/cQGoH+EbvHVf3IRxzqglvKgAAYaO6dwpvKbR59/i/PnKSKc7mCXkOFg1NlopFpwmvgYhYCW5splaTt+1MeSF/FFzZwqceUmh6nGgrSkOFnLGYXpqcJca1sS9GTPiAGgAQPsFOpdpw2s+w4VU3KBFRccbE= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The note about khugepaged counters references /proc/vmstat for the PMD case, but never mentions where the mTHPs stats can be found (i.e.: /sys/kernel/mm/transparent_hugepage/hugepages-kB/stats/) Add a small addition to this section for clarity. Also fix a missing period while we are at it. Suggested-by: Lorenzo Stoakes Signed-off-by: Nico Pache --- Documentation/admin-guide/mm/transhuge.rst | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/Documentation/admin-guide/mm/transhuge.rst b/Documentation/admin-guide/mm/transhuge.rst index 23f8d13c2629..123ea281082c 100644 --- a/Documentation/admin-guide/mm/transhuge.rst +++ b/Documentation/admin-guide/mm/transhuge.rst @@ -224,7 +224,7 @@ khugepaged will be automatically started when any THP size is enabled (either of the per-size anon control or the top-level control are set to "always" or "madvise"), and it'll be automatically shutdown when all THP sizes are disabled (when both the per-size anon control and the -top-level control are "never") +top-level control are "never"). process THP controls -------------------- @@ -301,7 +301,9 @@ being replaced by a PMD mapping, or (2) physical pages replaced by one hugepage of various sizes (PMD-sized or mTHP). Each may happen independently, or together, depending on the type of memory and the failures that occur. As such, this value should be interpreted roughly as a sign of progress, -and counters in /proc/vmstat consulted for more accurate accounting):: +and counters in /proc/vmstat consulted for more accurate accounting. +Per-order mTHP collapse statistics are also available under +/sys/kernel/mm/transparent_hugepage/hugepages-kB/stats/):: /sys/kernel/mm/transparent_hugepage/khugepaged/pages_collapsed -- 2.54.0