From mboxrd@z Thu Jan 1 00:00:00 1970 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 E231F14EC73 for ; Fri, 12 Sep 2025 01:37:41 +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=1757641063; cv=none; b=PaSifLnqYeKwwkX1wjXu4H26bphsODmGs93ykim3XisR/SfTKiwZfB8PSGuwZR0d5Ghfo1HaljfXccHyaxpGaB9dCLfj777vABh7cH9R5VCHuwHnNCMuFk8p1khkbepkK3i3E8PZo7sM2T0VAo7G4/wfK30FoKT5syBcJN5Hgq0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757641063; c=relaxed/simple; bh=N9mFsWGpGpgtUDJPGGCUdGpUVqBE6PiXz/A3ozR2vCI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jIvmVhf384LYOZ4T7ESU7Zj0BtYSgBogl36jw3zeK0/P+Zw35rpCDvlYV0bAELqq3t3FgRzr9NXf28MTYCCwAE45u5GPf9XyOS3SLO8vXYBF5MCTeMZozzJt30h43FfSCh/N0tDO8y0pm5Nw9dq26dj+RRdkpX4A7wAgmCl+ghw= 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=PpDYoJYl; 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="PpDYoJYl" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1757641061; 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=MLbuXhCNUOaSCGuiLR8P48OXtpr7aN3m52JVUEWvATc=; b=PpDYoJYlHs4ezVakjmad7JvTCeeCNeqqpG1c9OJceBxDnQ/IujaVOnlARM1BO/UTbRh106 LfPQt4vJ9tVS39NsTZOKYAtDPCYEj0h+ZiLuyilY+WNE5tTObmBgnCyDZv9YZwnQ8C9S0J sul80TNyRMcXksIvR/59GnW9tfLv4Bg= Received: from mx-prod-mc-02.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-622-CIga5bGjOuq_NhGaIzdmDw-1; Thu, 11 Sep 2025 21:37:37 -0400 X-MC-Unique: CIga5bGjOuq_NhGaIzdmDw-1 X-Mimecast-MFC-AGG-ID: CIga5bGjOuq_NhGaIzdmDw_1757641056 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (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-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E05641956087; Fri, 12 Sep 2025 01:37:35 +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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 18FDD1800452; Fri, 12 Sep 2025 01:37:29 +0000 (UTC) From: Chunyu Hu To: akpm@linux-foundation.org, david@redhat.com, shuah@kernel.org, linux-mm@kvack.org Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, chuhu@redhat.com Subject: [PATCH v3 2/3] selftests/mm: alloc hugepages in va_high_addr_switch test Date: Fri, 12 Sep 2025 09:37:10 +0800 Message-ID: <20250912013711.3002969-3-chuhu@redhat.com> In-Reply-To: <20250912013711.3002969-2-chuhu@redhat.com> References: <20250912013711.3002969-1-chuhu@redhat.com> <20250912013711.3002969-2-chuhu@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Alloc hugepages in the test internally, so we don't fully rely on the run_vmtests.sh. If run_vmtests.sh does that great, free hugepages is enough for being used to run the test, leave it as it is, otherwise setup the hugepages in the test. Save the original nr_hugepages value and restore it after test finish, so leave a stable test envronment. Signed-off-by: Chunyu Hu --- .../selftests/mm/va_high_addr_switch.sh | 37 +++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/tools/testing/selftests/mm/va_high_addr_switch.sh b/tools/testing/selftests/mm/va_high_addr_switch.sh index 325de53966b6..a7d4b02b21dd 100755 --- a/tools/testing/selftests/mm/va_high_addr_switch.sh +++ b/tools/testing/selftests/mm/va_high_addr_switch.sh @@ -9,6 +9,7 @@ # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 +orig_nr_hugepages=0 skip() { @@ -76,5 +77,41 @@ check_test_requirements() esac } +save_nr_hugepages() +{ + orig_nr_hugepages=$(cat /proc/sys/vm/nr_hugepages) +} + +restore_nr_hugepages() +{ + echo "$orig_nr_hugepages" > /proc/sys/vm/nr_hugepages +} + +setup_nr_hugepages() +{ + local needpgs=$1 + while read -r name size unit; do + if [ "$name" = "HugePages_Free:" ]; then + freepgs="$size" + break + fi + done < /proc/meminfo + if [ "$freepgs" -ge "$needpgs" ]; then + return + fi + local hpgs=$((orig_nr_hugepages + needpgs)) + echo $hpgs > /proc/sys/vm/nr_hugepages + + local nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages) + if [ "$nr_hugepgs" != "$hpgs" ]; then + restore_nr_hugepages + skip "$0: no enough hugepages for testing" + fi +} + check_test_requirements +save_nr_hugepages +# 4 keep_mapped pages, and one for tmp usage +setup_nr_hugepages 5 ./va_high_addr_switch --run-hugetlb +restore_nr_hugepages -- 2.49.0