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X-CSE-ConnectionGUID: fhCwFS5aQVG75MeplrNQVg== X-CSE-MsgGUID: zDrvbHFkSZ2dabcIZNk/ig== X-IronPort-AV: E=McAfee;i="6700,10204,11110"; a="41420526" X-IronPort-AV: E=Sophos;i="6.08,254,1712646000"; d="scan'208";a="41420526" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2024 07:32:10 -0700 X-CSE-ConnectionGUID: qwXb30wBQOKcJIT2kbiqwA== X-CSE-MsgGUID: NYXjrJQvTViS1Ij6Y5vCtg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,254,1712646000"; d="scan'208";a="42706810" Received: from bmurrell-mobl.amr.corp.intel.com (HELO [10.124.221.70]) ([10.124.221.70]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2024 07:32:08 -0700 Message-ID: Date: Fri, 21 Jun 2024 07:32:09 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 5/7] mm/x86: Make pud_leaf() only cares about PSE bit To: Peter Xu , linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20240621142504.1940209-1-peterx@redhat.com> <20240621142504.1940209-6-peterx@redhat.com> From: Dave Hansen Content-Language: en-US Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Huang Ying , Dave Hansen , Dave Jiang , Thomas Gleixner , Rik van Riel , x86@kernel.org, Hugh Dickins , Mel Gorman , Matthew Wilcox , Nicholas Piggin , Ingo Molnar , Borislav Petkov , Christophe Leroy , "Aneesh Kumar K . V" , "Kirill A . Shutemov" , Dan Williams , linuxppc-dev@lists.ozlabs.org, Andrew Morton , Vlastimil Babka , Oscar Salvador Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 6/21/24 07:25, Peter Xu wrote: > An entry should be reported as PUD leaf even if it's PROT_NONE, in which > case PRESENT bit isn't there. I hit bad pud without this when testing dax > 1G on zapping a PROT_NONE PUD. Yeah, looks like pmd_leaf() got fixed up because of its involvement in THP, but PUDs got missed. This patch also realigns pmd_leaf() and pud_leaf() behavior, which is important. Acked-by: Dave Hansen