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imf22.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=eRUBf3dX; spf=pass (imf22.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1773319424; a=rsa-sha256; cv=none; b=ORb7dEwRvu1xkezMtMv9+UnDvodOSUIBkar4nH6Vzq06xuZFOH+c9giPbW9mxo/K0ZhNhl uCrXCGoHbmSwHwdlKIShPmzNGtT0KTX1Fjtv9XBvEEBe2u/Kw2MaclzrWbd1zvS8OyAxpi h+VTW4kbQ/vEIsz6FQ7AiAp6DUfav5o= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 69EF160054; Thu, 12 Mar 2026 12:43:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55DD1C4CEF7; Thu, 12 Mar 2026 12:43:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773319423; bh=8S9bNJmF6iH82u3xXOAn4AoJikaKrAnFf4WVKPEmGxk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=eRUBf3dX6tDFd/wdJL0RAiR1hAauissEfjHzMqVRjfgm6+A8cJRjSAe1kA+dx/TfN ufTmt8h43/s25vH+jIPrmSlRHhwv30uARgMBqTfJJ9yaXkPQkHPVqfyY8ppn7whChp frS5QsFEy3F1KNz3/ylj/Cwi+KL7+0iGNFM2Yfr+kCfhPuT6FsDjoSfkZ1qQMntmhj yN1Hb+b3I99HYlAnXrMkjez3roLSMj9i9rD9AB2BP4zwu027cv0ySlc33z8GT+3rNV XARl5ZCnCHUgKcB5kbQa7s429uEUlEap6X6vSpvcQ2GM8OFLLW9JVLEQb9fOpVjodd 7ofK99QQPtwxw== Message-ID: <536527d3-6ffb-409d-a119-93c13a87823d@kernel.org> Date: Thu, 12 Mar 2026 13:43:37 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 01/13] selftests/mm: restore default nr_hugepages value during cleanup in charge_reserved_hugetlb.sh To: Sayali Patil , Andrew Morton , Shuah Khan , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Ritesh Harjani Cc: Zi Yan , Michal Hocko , Oscar Salvador , Lorenzo Stoakes , Dev Jain , Liam.Howlett@oracle.com, linuxppc-dev@lists.ozlabs.org References: <9d150c91d4fe18732f9a90234e6878b7bd7f61f7.1773305677.git.sayalip@linux.ibm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 2FD2BC0007 X-Stat-Signature: p5m68c9pyckwsn9nsabwjhhbqsq7sodu X-Rspam-User: X-HE-Tag: 1773319423-59004 X-HE-Meta: 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 +1TsmtJe u9Hv4JqiBXkNl+j4m3x6JRqk6dnBfKgArYz2K0cpG+q8+MGVm+mioqI+BnyyICyirm/wGX1Z+hTNVR/M= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 3/12/26 13:25, Sayali Patil wrote: > During cleanup, the value of /proc/sys/vm/nr_hugepages is currently being > set to 0. At the end of the test, if all tests pass, the original > nr_hugepages value is restored. However, if any test fails, it remains > set to 0. > With this patch, we ensure that the original nr_hugepages value is > restored during cleanup, regardless of whether the test passes or fails. > > Fixes: 7d695b1c3695b ("selftests/mm: save and restore nr_hugepages value") > Reviewed-by: Zi Yan > Signed-off-by: Sayali Patil > --- > tools/testing/selftests/mm/charge_reserved_hugetlb.sh | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh > index 447769657634..c9fe68b6fcf9 100755 > --- a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh > +++ b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh > @@ -65,7 +65,7 @@ function cleanup() { > if [[ -e $cgroup_path/hugetlb_cgroup_test2 ]]; then > rmdir $cgroup_path/hugetlb_cgroup_test2 > fi > - echo 0 >/proc/sys/vm/nr_hugepages > + echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages > echo CLEANUP DONE > } > Reviewed-by: David Hildenbrand (Arm) -- Cheers, David