From nobody Thu Dec 25 10:58:51 2025 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 6FA9351C38 for ; Fri, 19 Jan 2024 12:58:18 +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=1705669100; cv=none; b=T0LokoFtKxebuO3gx4YXL0Uo2Sxu1Pw2fhVCLBG62f9KWLlm3SypE6YwL3m4DeO/qw7jPL7RER2Q7tgmcLTT+u2CdVI8Es927Y6rcfpIZOwMcOuGX5tK5CU5+RPSAjrhCdzWXfi5DNE4WyAPla30JAlHP27/IIUhn6AXgENktTs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705669100; c=relaxed/simple; bh=9oN8WEtKHa5I91ygCWQnS1mqKVl+6aTCIb+eEtvC21Q=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Y6vV+3mWQStj5UjwW/AxKHyqjiFgej28MN9A/Kgtn8XsSbEovYvJp1lD679LHnrgaQqmsfMW4xyixqF+UggD5p/NKReqaDDTelaFZb9S+vjlLtwsHoLI114li4exdiD7/CmPx2V9qpxAn1FQh+ys7n3N2ClRLrUF0FtvqRinunY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none 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=aSKS9lGr; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none 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="aSKS9lGr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1705669097; 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; bh=tSl8vraS51FiTpTDwvXe67q3UpTXFaFfY6Fu62WAl5w=; b=aSKS9lGrwXqJJHj1TYgcO3vzw2WJeCu8XJqCHafkVI0Sn/EjwuIQYrsGbF5FEvfiR5PdK1 Y2F/sypdGIUOKmON9RfMFmJEc9POgUYA57zGr975TL3q0RlBYISN51D3bEX1uzp+yknhCb l+TAyoiYYAdCZEf+3LZmxUns7rgzriQ= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-396-56YpH6c8NtiCuO0XfASFRw-1; Fri, 19 Jan 2024 07:58:12 -0500 X-MC-Unique: 56YpH6c8NtiCuO0XfASFRw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 3AB5585A597; Fri, 19 Jan 2024 12:58:12 +0000 (UTC) Received: from localhost.redhat.com (unknown [10.22.32.164]) by smtp.corp.redhat.com (Postfix) with ESMTP id A227DC1690E; Fri, 19 Jan 2024 12:58:11 +0000 (UTC) From: Nico Pache To: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Cc: akpm@linux-foundation.org, shuah@kernel.org, donettom@linux.vnet.ibm.com Subject: [PATCH] selftests: mm: fix map_hugetlb failure on 64K page size systems Date: Fri, 19 Jan 2024 05:57:53 -0700 Message-ID: <20240119125753.152354-1-npache@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: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 Content-Type: text/plain; charset="utf-8" On systems with 64k page size and 512M huge page sizes, the allocation and test succeeds but errors out at the munmap. As the comment states, munmap will failure if its not HUGEPAGE aligned. This is due to the length of the mapping being 1/2 the size of the hugepage causing the munmap to not be hugepage aligned. Fix this by making the mapping length the full hugepage if the hugepage is larger than the length of the mapping. Signed-off-by: Nico Pache --- tools/testing/selftests/mm/map_hugetlb.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/mm/map_hugetlb.c b/tools/testing/selft= ests/mm/map_hugetlb.c index 193281560b61..dcb8095fcd45 100644 --- a/tools/testing/selftests/mm/map_hugetlb.c +++ b/tools/testing/selftests/mm/map_hugetlb.c @@ -58,10 +58,16 @@ int main(int argc, char **argv) { void *addr; int ret; + size_t maplength; size_t length =3D LENGTH; int flags =3D FLAGS; int shift =3D 0; =20 + maplength =3D default_huge_page_size(); + /* mmap with fail if the length is not page */ + if (maplength > length) + length =3D maplength; + if (argc > 1) length =3D atol(argv[1]) << 20; if (argc > 2) { --=20 2.43.0