From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C35AB1F03EF; Thu, 11 Dec 2025 18:19:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765477196; cv=none; b=qVxGH+P9SvbSDSpfMA4GWXWYAOELv0Dk2fL25eH1C9iurNT1/4z+MXgQf9z38JniULXqa+W1Fu9/2mSqa0Mkh2sYHmhjqJRfartTmwXFEE9a3PlydI5v8o/2tGEMFhA/FC18eKw/8AJKDJ/rvUXqqgSBqRlJqrpXsrQy6bSCDJU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765477196; c=relaxed/simple; bh=cDoWRb1naHE4Ryx+XC989ua85Uil7TKbOUUh1tQetps=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=KKwMxd1JfKD3o4gn4s7wqwFHHszcWuK5EMnzdxrvISuvnpdmEuvg9cBoL1Bbu39JSwjuR0NQ5HRWEdZlBUrG/4z978Mqrgsex3ozD5Mf3Hg7LAnWCaBvBlTfEChhJMk+T3oa6ibO/aDY8uQxwQD1ohDUYT6yaoVPoJMUi5D2Ggc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KtMcVwDI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KtMcVwDI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4AA69C4CEF7; Thu, 11 Dec 2025 18:19:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765477196; bh=cDoWRb1naHE4Ryx+XC989ua85Uil7TKbOUUh1tQetps=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=KtMcVwDI9SHPPHvynngkrw2iOicfwqQ1vpXclRwp9PkJyclAslf8qDofgrpOB+2+d rp/TgpfyqkpTWck9bpxKGRHoKoMnd3T1KzEmjn+FfL9hca3znLUz+xhgZp4m6mms/I WIg0KmgBL45cPLPglxPJA7byQBDLQeAYY1SPRAph5d+maUDX/QCuiZ2Vj6DMuRAwPF wdKlDBqiQfn5p1Q7EoS7rzJ3x8ldzUHtJiEYcx3VsPvqwB72snSsb1twhmp2JfWNme Tno6Z86ZdhUNzeaXWwvhcjHqvl0J5EguLjKM4YGevphopfc3Oqvzy/2wRJw5Aa8hED C0TfjH8yhnO+Q== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vTlGb-0000000C4Ps-3FpS; Thu, 11 Dec 2025 18:19:53 +0000 Date: Thu, 11 Dec 2025 18:19:53 +0000 Message-ID: <86sedgop86.wl-maz@kernel.org> From: Marc Zyngier To: Jiaqi Yan Cc: Sebastian Ott , Oliver Upton , Shuah Khan , kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org, Zenghui Yu Subject: Re: sea_to_user sefltest failure In-Reply-To: References: <1478ac09-8134-5551-13b6-c7be096262af@redhat.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: jiaqiyan@google.com, sebott@redhat.com, oupton@kernel.org, shuah@kernel.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org, zenghui.yu@linux.dev X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Thu, 11 Dec 2025 18:04:48 +0000, Jiaqi Yan wrote: > > [1 ] > Hi Sebastian, > > CONFIGs seem alright to me. Do you boot kernel with cmdline options like > "default_hugepagesz=1G hugepagesz=1G hugepages=64", or dynamically set up > huge pages via "echo 64 > > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages"? I don't think this is irrelevant. The whole thing seems to have some logic flaws, see the extensive report from Zenghui[1] as a reply to your series. M. [1] https://lore.kernel.org/r/3061f5f8-cef0-b7b1-c4de-f2ceea29af9a@huawei.com -- Without deviation from the norm, progress is not possible.