From nobody Fri Apr 3 01:22:47 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 15BFE3932D4 for ; Thu, 26 Mar 2026 03:27:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774495659; cv=none; b=Ad4cxXNmwSiUysALE2Gq4QdtnA6oitWD4Ek4mf7qlSGCGB6Cx2ikVUuEjgczsgcIL80CkULPp51tvvmxh3DKNMfQoR2qBg/V6CaWqpbvZ14WwNADaiRRYSk650VJQksU39PGhfVEDwt7t1NpoUxGqDb0zyu5/L9nqDpJD22MQuQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774495659; c=relaxed/simple; bh=etMNLgsAqgXT7GNsz5mVXZFt1m1s+ZnbfehPyo/QgrQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=OBnoU6W++xi2Bovvs1EgRSkzx4U+jL/k6CiSTQi4HCu3pJe1VB1vCa0FtdTI1lGHs87kJw4+C6dNR98hamctj8OTmm/uoPYU1VJad+kBJQHQO7ui5iyzcaoISEXtwQ7hqSwpgty9+BTYq6/gGWC7LDTshcy+TiG0SeEnU9d2lA0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=de4xc4Ku; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="de4xc4Ku" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1774495657; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mpe5+6BEENtzobjSR9FLGbgq/dfpUrP+sg7IFVwkji8=; b=de4xc4Kuc2F/t4nfDEaVaeXdUUlsvVB0TSzQXbIY3aGyr5yX2f+lOMP9OCWKYTAPzuwjnl vsMt8J2YYMFJTK9/Mjdlqbz1/YDP3sNUtu+eI+emN45EZaJMDCw+K08Uf4cpw24UlZwebN C7B6i4tk8zW5RDMCJCtrZyecbW4mTFE= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-606-f-2A5cPvMGCNGCUaiYzyXA-1; Wed, 25 Mar 2026 23:27:33 -0400 X-MC-Unique: f-2A5cPvMGCNGCUaiYzyXA-1 X-Mimecast-MFC-AGG-ID: f-2A5cPvMGCNGCUaiYzyXA_1774495652 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id D4AAD195608D; Thu, 26 Mar 2026 03:27:31 +0000 (UTC) Received: from fedora-laptop-x1.redhat.com (unknown [10.72.112.83]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B61DD1955D84; Thu, 26 Mar 2026 03:27:25 +0000 (UTC) From: Li Wang To: akpm@linux-foundation.org, yosry@kernel.org, nphamcs@gmail.com, hannes@cmpxchg.org, mhocko@kernel.org, mkoutny@suse.com, muchun.song@linux.dev, tj@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev Cc: longman@redhat.com, liwang@redhat.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v5 3/8] selftests/cgroup: use runtime page size for zswpin check Date: Thu, 26 Mar 2026 11:26:53 +0800 Message-ID: <20260326032658.96819-4-liwang@redhat.com> In-Reply-To: <20260326032658.96819-1-liwang@redhat.com> References: <20260326032658.96819-1-liwang@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 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). As a result, the test requires too many pages to pass and fails spuriously even when zswap is working. Use sysconf(_SC_PAGESIZE) for the zswpin threshold conversion so the check matches the actual system page size. Signed-off-by: Li Wang Cc: Johannes Weiner Cc: Michal Hocko Cc: Michal Koutn=C3=BD Cc: Muchun Song Cc: Nhat Pham Cc: Tejun Heo Cc: Roman Gushchin Cc: Shakeel Butt Reviewed-by: Yosry Ahmed --- tools/testing/selftests/cgroup/test_zswap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_zswap.c b/tools/testing/se= lftests/cgroup/test_zswap.c index ed257d464bd6..516da5d52bfd 100644 --- a/tools/testing/selftests/cgroup/test_zswap.c +++ b/tools/testing/selftests/cgroup/test_zswap.c @@ -243,7 +243,7 @@ static int test_zswapin(const char *root) goto out; } =20 - if (zswpin < MB(24) / PAGE_SIZE) { + if (zswpin < MB(24) / sysconf(_SC_PAGESIZE)) { ksft_print_msg("at least 24MB should be brought back from zswap\n"); goto out; } --=20 2.53.0