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 8B4B2C9833F for ; Mon, 28 Sep 2026 13:11:38 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6FA956B0096; Mon, 28 Sep 2026 09:11:37 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6AB8E6B0098; Mon, 28 Sep 2026 09:11:37 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5C31A6B0099; Mon, 28 Sep 2026 09:11:37 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 2D3816B0096 for ; Mon, 28 Sep 2026 09:11:37 -0400 (EDT) Received: from smtpin17.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay01.hostedemail.com (Postfix) with ESMTP id ACF521C1DC8 for ; Mon, 28 Sep 2026 13:11:36 +0000 (UTC) X-FDA: 85263207792.17.544E0A8 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf01.hostedemail.com (Postfix) with ESMTP id 807DD40010 for ; Mon, 28 Sep 2026 13:11:34 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b="Z/86+DIc"; spf=pass (imf01.hostedemail.com: domain of luizcap@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=luizcap@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=1790601094; 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-type: content-transfer-encoding:content-transfer-encoding:in-reply-to: references:dkim-signature; bh=U1oksysxdIEOFzBPfANmMTd4+i/t9FKmSwmS/c9F7Hk=; b=tErkaQEnx2gdEFPDVtCpUmDYZmJ0ZUWFu/0nnvsNRowgNB0vn7eogBg5tdAmpcKDz4zjzV JvpjE7oOIeyXa6t59KSFfreNJ9bQsW7SSPQuyxHqtJ9j7krFDO7bdfXojo/fgdW6q8I4YC r1scP5Awp9/fzNMiFPpt2GZYYBEdHzU= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b="Z/86+DIc"; spf=pass (imf01.hostedemail.com: domain of luizcap@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=luizcap@redhat.com; dmarc=pass (policy=quarantine) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1790601094; b=ot7M0GjSn278OFNh2JYN4VJsgXeDFSo4MhtYl+9zc4XJ0t5coXKUNh8S1ob5BtNMtmnUUn moTxwVl4SMm2k9pJx7GRmT5NDkjA2bJSNSR3c6THaH1EKwGzoyejcDx+YaKUJLxLVT1m+e pVmTIR0ah88+rKQChryOuAsGBjugAtE= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1790601093; 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; bh=U1oksysxdIEOFzBPfANmMTd4+i/t9FKmSwmS/c9F7Hk=; b=Z/86+DIcO4VXE4GO80gPSlhirLrUiPcDSoqKZg/TegwIBGHUzX/ChE5uuUyUrRqQy7GDY3 xreYnpMYGNh1ZRvWZ9Bq7d8+6DNc11hiHg9PKFnCbdT/Rm+Mmj983iudIz8H8HWTBgEUHb wrkPiiBRxO4OvUGHTQlrU5lOyzGDoFU= Received: from mx-prod-mc-03.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-151-nhfxfn3VNHmacMGaCHo8xA-1; Mon, 28 Sep 2026 09:11:30 -0400 X-MC-Unique: nhfxfn3VNHmacMGaCHo8xA-1 X-Mimecast-MFC-AGG-ID: nhfxfn3VNHmacMGaCHo8xA_1790601089 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3EFFB190F985; Mon, 28 Sep 2026 13:11:29 +0000 (UTC) Received: from lcapitul-thinkpadt14gen3.rmtcaqc.csb (headnet04.pony-001.prod.iad2.dc.redhat.com [10.2.32.116]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 124F91800473; Mon, 28 Sep 2026 13:11:27 +0000 (UTC) From: Luiz Capitulino To: sashal@kernel.org, stable@vger.kernel.org Cc: rppt@kernel.org, sayalip@linux.ibm.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v6.12.y] selftests/mm: hugepage-mremap: fix mapping alignment Date: Mon, 28 Sep 2026 09:11:17 -0400 Message-ID: <20260928131117.231700-1-luizcap@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-Mimecast-MFC-PROC-ID: Tc_tXTJNOkVzuzhFpory0-GoGsNMB8Af6RcbbWI_h3A_1790601089 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 807DD40010 X-Rspam-User: X-Stat-Signature: 14aecttgng33wr8s3poq7oq9mhy9h4jg X-HE-Tag: 1790601094-338139 X-HE-Meta: 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 lsEpBseD EwnSoqf2U/qc3rTL25biQfMjMYgJ40f7WU6hG1o0zqM5i4j31BU3IvBHke3oipiC4+g2GeUIw1PkTxnitzqu4dNdYGEfD+GkVj7WKe1oHjR1naxHP9nYXX9f5DRdOTRLtxb8q8Jqo06UHCKW50zekyQ7zaezluhPhJKhVtCjLMDdlOFCv5eCriSdPbC69SMCnLaUHWzudzzH/vUpz3mfeo1uJFwpNZHyCetYGSA8TTsyByNqXaRdUV/m3YQlhS4hekikSe0DHiSNruA4wpCevoutdKFQvWYfLd0NqTbB8IhHHgXGt3FBIfUf0W/D2MzsBCLR7ZfFMqVvcmu4wOZZhHnJgnwxTeK/7OSPDzlaikYMahH0= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: commit a914785f6349da754e1226420bf4e51961956769 upstream. When running the HugeTLB kselftest suite on arm64 with 64K base pages, this test always fails: # ------------------------- # running ./hugepage-mremap # ------------------------- # TAP version 13 # 1..1 # # Map haddr: Returned address is 0x7eaa40000000 # # Map daddr: Returned address is 0x7daa40000000 # # Map vaddr: Returned address is 0x7faa40000000 # Bail out! ioctl-UFFDIO_REGISTER: Invalid argument # # Planned tests != run tests (1 != 0) # # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0 # [FAIL] not ok 1 hugepage-mremap # exit=1 # NOTE: These hugetlb tests provide minimal coverage. Use # https://github.com/libhugetlbfs/libhugetlbfs.git for # hugetlb regression testing. # SKIP ./uffd-wp-mremap The problem is that the default HugeTLB page size on such systems is 512 MiB and 'length' is not aligned to the page size. This causes uffd_register() to fail as 'length' is 10 MiB and not aligned to the HugeTLB page size. On upstream this was fixed by a914785f6349 ("selftests/mm: hugetlb-mremap: add setup of HugeTLB pages") as that commit aligns 'length' to the default HugeTLB page size as part of what it's doing. Since this commit is part of a 50+ patch series, we backport only the 'length' alignment bits to fix the test. Signed-off-by: Luiz Capitulino --- tools/testing/selftests/mm/hugepage-mremap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c index 3070484f9ed0..42dd4eeba52b 100644 --- a/tools/testing/selftests/mm/hugepage-mremap.c +++ b/tools/testing/selftests/mm/hugepage-mremap.c @@ -87,6 +87,7 @@ static void register_region_with_uffd(char *addr, size_t len) int main(int argc, char *argv[]) { + unsigned long hugepage_size; size_t length = 0; int ret = 0, fd; @@ -104,7 +105,12 @@ int main(int argc, char *argv[]) else length = DEFAULT_LENGTH_MB; + hugepage_size = default_huge_page_size(); + if (!hugepage_size) + ksft_exit_skip("Could not detect default hugetlb page size\n"); + length = MB_TO_BYTES(length); + length = (length + hugepage_size - 1) & ~(hugepage_size - 1); fd = memfd_create(argv[0], MFD_HUGETLB); if (fd < 0) ksft_exit_fail_msg("Open failed: %s\n", strerror(errno)); -- 2.55.0