From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7EBA3E66886 for ; Sun, 21 Dec 2025 12:27:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E5C486B00D7; Sun, 21 Dec 2025 07:27:03 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E1C566B00D9; Sun, 21 Dec 2025 07:27:03 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D49DD6B00DA; Sun, 21 Dec 2025 07:27:03 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id BD7886B00D7 for ; Sun, 21 Dec 2025 07:27:03 -0500 (EST) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 8AF22BB898 for ; Sun, 21 Dec 2025 12:27:03 +0000 (UTC) X-FDA: 84243402726.11.C7590E6 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf14.hostedemail.com (Postfix) with ESMTP id C553B100003 for ; Sun, 21 Dec 2025 12:27:01 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=Kj7Dqfs0; spf=pass (imf14.hostedemail.com: domain of liwang@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=liwang@redhat.com; dmarc=pass (policy=quarantine) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1766320021; a=rsa-sha256; cv=none; b=2lKqnFiB55ho9BI0/CkJqohogbbAeBN6dJCgOxrMDqTcMmIQWdTCZiz6ztvSKritjjne6E TkCwow9pvNi0nIfTyzsOI9hsoIxWRMHF4UWF228+uTrtTvetinExk/F6rA3d3D4om0mpVZ hLC8uqBahQxgSms+GeBBRVJ9AJSCkAo= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=Kj7Dqfs0; spf=pass (imf14.hostedemail.com: domain of liwang@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=liwang@redhat.com; dmarc=pass (policy=quarantine) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1766320021; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=zzPxgBwMBIOV5Pem2xEekXV9hInqKLJADfIWievTtPI=; b=eGfXWJUivcgfsaKkWkFoGC20W6bCIqbdrYXg/yCrfQicyT1ktJqP1nA68UpeyeP8beXU3A PfkLzXxRN6zNueOpXX4KXQvgsH/BlFdVTFeAe5fO5/bRgmZtPyUatr4PW1vleMWeFFAgV2 DmH8bxNbH2iXCcJsUF8G/9OYWNToIIA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1766320021; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zzPxgBwMBIOV5Pem2xEekXV9hInqKLJADfIWievTtPI=; b=Kj7Dqfs006PD4dds6qtvFmbcsEEXY1n+j7eZOv1fTDf1yhI/wz/MezzFVepj/0WNPI1DPp 4hriHGEdYzVtBFA7EUvc54E8KoV+VNYpdvkeZdjEn4RKuXCXwi4Z2TC1909/tz7paov57W uw2JhXtiT1aJQRLuUGaqL1y2lzxpnPQ= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-622-ji7ZnnHKOGe1JeQVEFtGFw-1; Sun, 21 Dec 2025 07:26:57 -0500 X-MC-Unique: ji7ZnnHKOGe1JeQVEFtGFw-1 X-Mimecast-MFC-AGG-ID: ji7ZnnHKOGe1JeQVEFtGFw_1766320016 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B83F41800343; Sun, 21 Dec 2025 12:26:55 +0000 (UTC) Received: from dell-per7425-02.rhts.eng.pek2.redhat.com (dell-per7425-02.rhts.eng.pek2.redhat.com [10.73.116.18]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 2CCA319560B4; Sun, 21 Dec 2025 12:26:51 +0000 (UTC) From: Li Wang To: akpm@linux-foundation.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: David Hildenbrand , Mark Brown , Shuah Khan , Waiman Long Subject: [PATCH v3 2/3] selftests/mm/charge_reserved_hugetlb: drop mount size for hugetlbfs Date: Sun, 21 Dec 2025 20:26:38 +0800 Message-ID: <20251221122639.3168038-3-liwang@redhat.com> In-Reply-To: <20251221122639.3168038-1-liwang@redhat.com> References: <20251221122639.3168038-1-liwang@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Rspam-User: X-Rspamd-Queue-Id: C553B100003 X-Rspamd-Server: rspam04 X-Stat-Signature: k7akf4jppxpkfsy8r9yp36xoztukpka5 X-HE-Tag: 1766320021-729309 X-HE-Meta: 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 /CXFttjT UDC6QOvQmiNdtCzHHUg9DpGxQXDUWs7iD3Igo60MjF+XY/H6J8dfUKYdQ2/RvouPxVTFMW5ARfGJEJvpoRLLOMy2XkYXaf00GZW9x4UvX3tx9AyVzJvtsnjRD05fvrQ327kOZbSZvpGwpeQcKJCmXbLd4yuWw7AhW4yKw1qI/XanhDV7CegwPdhYjlkmsb5cjEcvG5D58uZqoW0PG6fFBZlHR3JqXiCxWmN1z736Q6Uizuy4rqzdXxGWaAAiBnDK9glYg6+7+o6p/yTATRc2FyvKF7vw8/9+DS4o26YKGwNyYGJ/7o05IEG2XXMpDMOTz/xoi0FjJIgOIWNXBkY8pC35qnw3hR/HRUdyeRUozvWt9Q2xhJglO3+o5LVrgK13mv4sXttEA9vYeEAVSh7xFw3NvYg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: charge_reserved_hugetlb.sh mounts a hugetlbfs instance at /mnt/huge with a fixed size of 256M. On systems with large base hugepages (e.g. 512MB), this is smaller than a single hugepage, so the hugetlbfs mount ends up with zero capacity (often visible as size=0 in mount output). As a result, write_to_hugetlbfs fails with ENOMEM and the test can hang waiting for progress. --- Error log --- # uname -r 6.12.0-xxx.el10.aarch64+64k #./charge_reserved_hugetlb.sh -cgroup-v2 # ----------------------------------------- ... # nr hugepages = 10 # writing cgroup limit: 5368709120 # writing reseravation limit: 5368709120 ... # write_to_hugetlbfs: Error mapping the file: Cannot allocate memory # Waiting for hugetlb memory reservation to reach size 2684354560. # 0 # Waiting for hugetlb memory reservation to reach size 2684354560. # 0 ... # mount |grep /mnt/huge none on /mnt/huge type hugetlbfs (rw,relatime,seclabel,pagesize=512M,size=0) # grep -i huge /proc/meminfo ... HugePages_Total: 10 HugePages_Free: 10 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 524288 kB Hugetlb: 5242880 kB Drop the mount args with 'size=256M', so the filesystem capacity is sufficient regardless of HugeTLB page size. Fixes: 29750f71a9 ("hugetlb_cgroup: add hugetlb_cgroup reservation tests") Signed-off-by: Li Wang Cc: David Hildenbrand Cc: Mark Brown Cc: Shuah Khan Cc: Waiman Long --- tools/testing/selftests/mm/charge_reserved_hugetlb.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh index e1fe16bcbbe8..fa6713892d82 100755 --- a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh +++ b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh @@ -290,7 +290,7 @@ function run_test() { setup_cgroup "hugetlb_cgroup_test" "$cgroup_limit" "$reservation_limit" mkdir -p /mnt/huge - mount -t hugetlbfs -o pagesize=${MB}M,size=256M none /mnt/huge + mount -t hugetlbfs -o pagesize=${MB}M none /mnt/huge write_hugetlbfs_and_get_usage "hugetlb_cgroup_test" "$size" "$populate" \ "$write" "/mnt/huge/test" "$method" "$private" "$expect_failure" \ @@ -344,7 +344,7 @@ function run_multiple_cgroup_test() { setup_cgroup "hugetlb_cgroup_test2" "$cgroup_limit2" "$reservation_limit2" mkdir -p /mnt/huge - mount -t hugetlbfs -o pagesize=${MB}M,size=256M none /mnt/huge + mount -t hugetlbfs -o pagesize=${MB}M none /mnt/huge write_hugetlbfs_and_get_usage "hugetlb_cgroup_test1" "$size1" \ "$populate1" "$write1" "/mnt/huge/test1" "$method" "$private" \ -- 2.49.0