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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 v2 7/7] mm: Documentation: clarify where the mTHP stats live Date: Tue, 14 Jul 2026 20:59:36 -0600 Message-ID: <20260715025941.1571316-8-npache@redhat.com> In-Reply-To: <20260715025941.1571316-1-npache@redhat.com> References: <20260715025941.1571316-1-npache@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-MFC-PROC-ID: _K7rv6wXU7JWpct45kfWLmp7HjXYzGUFECPOXsPlbVA_1784084480 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 277CE120006 X-Stat-Signature: gw3cpebd5phqtq8omrw3wu5ytfb4c3p5 X-HE-Tag: 1784084488-209030 X-HE-Meta: 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 xUy5H+pi q2Xd7IIgNeLK9Hp41BlEjz5H/l835ac0RD/BprtBRSXYyti86Cao4nii5b8JeK7xXQFlZ3Vqjdk5TtCfh8pKo2cwkA2xM0VjKkC/vmyb/6/0/+OTekaAX+m1knJxRo986YcDT8tPa0IvIDI8wEiTvnCPEnTOgqllgNWKplmN10TmBRNIoGyzXXxdVvIb7tvuwBHEhqU4QHdxuFrLofcpRO80KkAqDfPBthuycWaNhe+enwWxJd0m7iRdtpwKFwcVt6W85YJagmerLgqIyraaLqY95obL+FfXnNe4swYsKXjX/ItTOBNx1KvmdWmgMdG/gYRGuQRshmcY+ybOYpzNZUoITX8Xr+0yDgizYCX9c11WyTNx/OfAFcyh5QTlQ0v9njYpxJsTn4wC27Jo= 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. Reviewed-by: Baolin Wang 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 16f37135ed80..b187d618452f 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