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 00F92C43458 for ; Wed, 8 Jul 2026 13:49:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DD8E06B0005; Wed, 8 Jul 2026 09:49:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D8A0D6B0088; Wed, 8 Jul 2026 09:49:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C9FE26B008A; Wed, 8 Jul 2026 09:49:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id A68176B0005 for ; Wed, 8 Jul 2026 09:49:04 -0400 (EDT) Received: from smtpin29.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 2CE1B1A016B for ; Wed, 8 Jul 2026 13:49:04 +0000 (UTC) X-FDA: 84965740608.29.7A94064 Received: from out-178.mta1.migadu.com (out-178.mta1.migadu.com [95.215.58.178]) by imf05.hostedemail.com (Postfix) with ESMTP id BCF3310000D for ; Wed, 8 Jul 2026 13:49:01 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=mXbZxdXN; spf=pass (imf05.hostedemail.com: domain of usama.arif@linux.dev designates 95.215.58.178 as permitted sender) smtp.mailfrom=usama.arif@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783518542; 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=TEGzzoFWcnNWGGmasKpR7vNO3wPHNttV6bHdoJJUeuk=; b=YkhFONr32YLzEzwTjgKx7EQBEy6QGZYdAUZysUHvyMcJzD+SRdQ4czX9tx8R6p1668gc+n hVmIk0UD0xuLiRwmZ9SD2gZDW58LH6tRqLUWhoYT5LPYZRzV1wsEGAFGTtLvLc7H0Z5Em7 Ay8+9wafCuIiSS9rX1d5ictSo0aRzKI= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=mXbZxdXN; spf=pass (imf05.hostedemail.com: domain of usama.arif@linux.dev designates 95.215.58.178 as permitted sender) smtp.mailfrom=usama.arif@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783518542; b=Ykf6jMsA3OzcQ466baqEUMZpzAo5VZTzQ6Sk+cjVXWgwLuqMakMRQtbYwGEdX819uB6o8G JTPGyz6U9k7tpalP15Z499pD74WzSo44DeSdN5/y6LHsc43I6IAIc0ZymGh2FZKKa+kbUI DlEC1Af0bo0ecpsdhugRUSkfMIL3Cho= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1783518539; 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=TEGzzoFWcnNWGGmasKpR7vNO3wPHNttV6bHdoJJUeuk=; b=mXbZxdXNK8zwfiH+BaVAX/a14LKht5ZVC+Wv7EwJmNmgfH7LWboOjRCpvZuv44yqZ92n+L HTpOJmwORQJdus2K/nxg2k5sHDV24WBE1jpcCO3Xmgfz/8evz+Zw4qadzjqXk+l1Ie5Dkb HqYuO1oM26W/bUjStsW0rqIMNmJO8nA= From: Usama Arif To: Sayali Patil Cc: Usama Arif , Andrew Morton , Shuah Khan , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Ritesh Harjani , David Hildenbrand , Zi Yan , Michal Hocko , Oscar Salvador , Lorenzo Stoakes , Dev Jain , Liam.Howlett@oracle.com, linuxppc-dev@lists.ozlabs.org, Miaohe Lin , Venkat Rao Bagalkote Subject: Re: [PATCH v3 1/3] selftests/mm: handle EINVAL when configuring gigantic hugepages Date: Wed, 8 Jul 2026 06:48:50 -0700 Message-ID: <20260708134851.4153021-1-usama.arif@linux.dev> In-Reply-To: <2e3b585cbb30b2fc495dcd49d75de6f6da61861c.1783446924.git.sayalip@linux.ibm.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: BCF3310000D X-Stat-Signature: swswox1o4bh8xq6hpz6e954z8rg7enby X-HE-Tag: 1783518541-172865 X-HE-Meta: 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 HB/rCY5Q cc5Vu133IayOhnl+fnrz/PP1oPRYAxPzttOqZ/525/hZTYvSqhdjYtiYLF8bz5r1WscOyFk2ZRCS7VbsP4+6Ra4lBwKXHc3V2jRK1mVliKOSrROrT8RxSWNiuMq6UcQdVe4KP6Zmty188fKkM8/EN71YpFx5uZI6IV59xa8pM3LPFqTSqTrriVid1taOBdyDOd9QieihzwXflC2sH8Ygsnbrb8c5fVvc7QNSij8tRwy1C8cKM9CIfX99otySjry2u+AYzQ5cLfPx2TFl1DN8x+xUXaHycfqlUcwVM65iqrr5i66l1c6POImQTnYxXo2jtsZhk Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 8 Jul 2026 12:29:05 +0530 Sayali Patil wrote: > Some MM selftests attempt to configure the amount of > HugeTLB pages of different sizes by writing to nr_hugepages. > > PowerPC hash MMU pSeries systems advertise gigantic hugepage sizes > but do not support runtime allocation of such pages, writes > to the corresponding nr_hugepages file fail with -EINVAL. > This causes the test to bail out even though the failure is due > to a platform limitation rather than the > functionality being tested. > > Ignore -EINVAL when configuring nr_hugepages so that tests continue to > run on systems where gigantic hugepage allocation is unsupported. > > Before patch: > ------------------------- > running ./hugetlb-madvise > ------------------------- > TAP version 13 > 1..1 > [INFO] detected hugetlb page size: 16777216 KiB > [INFO] detected hugetlb page size: 16384 KiB > ok 1 MADV_DONTNEED and MADV_REMOVE on hugetlb > Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0 > Bail out! /sys/kernel/mm/hugepages/hugepages-16777216kB/nr_hugepages > write(0) failed: Invalid argument > Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0 > [FAIL] > > After patch: > ------------------------- > running ./hugetlb-madvise > ------------------------- > TAP version 13 > 1..1 > [INFO] detected hugetlb page size: 16777216 KiB > [INFO] detected hugetlb page size: 16384 KiB > ok 1 MADV_DONTNEED and MADV_REMOVE on hugetlb > Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0 > [PASS] > > Fixes: 27477b28b74f ("selftests/mm: hugepage_settings: add APIs to get and set nr_hugepages") > Co-developed-by: David Hildenbrand (Arm) > Signed-off-by: David Hildenbrand (Arm) > Signed-off-by: Sayali Patil > --- > .../testing/selftests/mm/hugepage_settings.c | 2 +- > tools/testing/selftests/mm/vm_util.c | 26 ++++++++++++++++--- > tools/testing/selftests/mm/vm_util.h | 1 + > 3 files changed, 24 insertions(+), 5 deletions(-) > Acked-by: Usama Arif