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Wed, 17 Jun 2026 05:25:16 -0700 (PDT) Date: Wed, 17 Jun 2026 14:25:14 +0200 From: Michal =?utf-8?Q?Koutn=C3=BD?= To: Li Wang Cc: akpm@linux-foundation.org, tj@kernel.org, longman@redhat.com, roman.gushchin@linux.dev, hannes@cmpxchg.org, yosry@kernel.org, jiayuan.chen@linux.dev, nphamcs@gmail.com, chengming.zhou@linux.dev, shuah@kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Michal Hocko , Muchun Song , Shakeel Butt Subject: Re: [PATCH v7 3/8] selftests/cgroup: use runtime page size for zswpin check Message-ID: References: <20260424040059.12940-1-li.wang@linux.dev> <20260424040059.12940-4-li.wang@linux.dev> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="fw3psxfcciuimhrk" Content-Disposition: inline In-Reply-To: <20260424040059.12940-4-li.wang@linux.dev> X-Rspamd-Queue-Id: 40B741C000D X-Stat-Signature: r4s4pqhch8sfp8hf5f4m4d8ssymkfae8 X-Rspamd-Server: rspam03 X-Rspam-User: X-HE-Tag: 1781699118-240021 X-HE-Meta: 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 EmuQ/bRk 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --fw3psxfcciuimhrk Content-Type: text/plain; protected-headers=v1; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH v7 3/8] selftests/cgroup: use runtime page size for zswpin check MIME-Version: 1.0 On Fri, Apr 24, 2026 at 12:00:54PM +0800, Li Wang wrote: > test_zswapin compares memory.stat:zswpin (counted in pages) against a > byte threshold converted with PAGE_SIZE. In cgroup selftests, PAGE_SIZE > is hardcoded to 4096, which makes the conversion wrong on systems with > non-4K base pages (e.g. 64K). >=20 > As a result, the test requires too many pages to pass and fails > spuriously even when zswap is working. >=20 > Use sysconf(_SC_PAGESIZE) for the zswpin threshold conversion so the > check matches the actual system page size. >=20 > Signed-off-by: Li Wang > Cc: Johannes Weiner > Cc: Michal Hocko > Cc: Michal Koutn=FD > Cc: Muchun Song > Cc: Nhat Pham > Cc: Tejun Heo > Cc: Roman Gushchin > Cc: Shakeel Butt > Reviewed-by: Yosry Ahmed > Acked-by: Nhat Pham > Reviewed-by: Michal Koutn=FD --fw3psxfcciuimhrk Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iJEEABYKADkWIQRCE24Fn/AcRjnLivR+PQLnlNv4CAUCajKSJBsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQfj0C55Tb+AifigEAsoKP16b+0Ymtb3KGVhyI va7ay0/8bjusHJQkcZqNicIA/1Wml5S9Nn0nE+3XPCz+4d6nCaUqIpGdRKFGT56w XSAD =y8NZ -----END PGP SIGNATURE----- --fw3psxfcciuimhrk--