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[180.214.233.91]) by smtp.gmail.com with ESMTPSA id i127-20020a639d85000000b00478162d9923sm336384pgd.13.2023.01.23.20.09.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Jan 2023 20:09:44 -0800 (PST) Received: by debian.me (Postfix, from userid 1000) id D22F7105170; Tue, 24 Jan 2023 11:09:41 +0700 (WIB) Date: Tue, 24 Jan 2023 11:09:41 +0700 From: Bagas Sanjaya To: Stefan Roesch , linux-mm@kvack.org Cc: linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: Re: [RESEND RFC PATCH v1 15/20] docs: document new procfs ksm knobs Message-ID: References: <20230123173748.1734238-1-shr@devkernel.io> <20230123173748.1734238-16-shr@devkernel.io> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="XX6agEIUzIpHNuNV" Content-Disposition: inline In-Reply-To: <20230123173748.1734238-16-shr@devkernel.io> X-Stat-Signature: 8pbse3pid9k86t8kpppmgr81p4tyfxn3 X-Rspam-User: X-Rspamd-Queue-Id: 1827F4001B X-Rspamd-Server: rspam06 X-HE-Tag: 1674533385-928440 X-HE-Meta: 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 rKCWDiWu 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.067779, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --XX6agEIUzIpHNuNV Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jan 23, 2023 at 09:37:43AM -0800, Stefan Roesch wrote: > This documents the ksm_process_profit and ksm_merge_type settings in > ksm_stat. "Document both ksm_process_profit and ksm_merge_type proc settings." >=20 > Signed-off-by: Stefan Roesch > --- > Documentation/admin-guide/mm/ksm.rst | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) >=20 > diff --git a/Documentation/admin-guide/mm/ksm.rst b/Documentation/admin-g= uide/mm/ksm.rst > index 72189bf1283e..70896f01d641 100644 > --- a/Documentation/admin-guide/mm/ksm.rst > +++ b/Documentation/admin-guide/mm/ksm.rst > @@ -211,7 +211,8 @@ several times, which are unprofitable memory consumed. > ksm_rmap_items * sizeof(rmap_item). > =20 > where ksm_merging_pages is shown under the directory ``/proc//``, > - and ksm_rmap_items is shown in ``/proc//ksm_stat``. > + and ksm_rmap_items is shown in ``/proc//ksm_stat``. The process = profit > + is also shown in ``/proc//ksm_stat`` as ksm_process_profit. > =20 > From the perspective of application, a high ratio of ``ksm_rmap_items`` = to > ``ksm_merging_pages`` means a bad madvise-applied policy, so developers = or > @@ -222,6 +223,9 @@ so if the ``ksm_rmap_items/ksm_merging_pages`` ratio = exceeds 64 on 64-bit CPU > or exceeds 128 on 32-bit CPU, then the app's madvise policy should be dr= opped, > because the ksm profit is approximately zero or negative. > =20 > +The ksm_merge_type in ``/proc//ksm_stat`` shows the merge type of t= he > +process. Valid values are ``none``, ``madvise`` and ``process``. > + > Monitoring KSM events > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > =20 The change LGTM. --=20 An old man doll... just what I always wanted! - Clara --XX6agEIUzIpHNuNV Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEARYKAB0WIQSSYQ6Cy7oyFNCHrUH2uYlJVVFOowUCY89aBQAKCRD2uYlJVVFO o5VVAQDUTWIM8oin7v2bLz8Fg+xjQgz6v0OLJxT0G5Q0oiQeuAEAtVt3/yWMls24 CeYG0s/x1NbG/nXXj/D9+N7HeZvVSwY= =O4Jm -----END PGP SIGNATURE----- --XX6agEIUzIpHNuNV--