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X-CSE-ConnectionGUID: eRow8keRQZ6Hxo/eT36SrA== X-CSE-MsgGUID: c7DE7s0gRrWGYmhdyv0oqg== X-IronPort-AV: E=McAfee;i="6700,10204,11291"; a="35183114" X-IronPort-AV: E=Sophos;i="6.12,248,1728975600"; d="scan'208";a="35183114" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Dec 2024 09:13:58 -0800 X-CSE-ConnectionGUID: BjE5PnWZRtuB8GpG2kHABA== X-CSE-MsgGUID: 7CSY673QTbyIAwyjyBTzCw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,248,1728975600"; d="scan'208";a="98779806" Received: from msangele-mobl.amr.corp.intel.com (HELO [10.124.221.111]) ([10.124.221.111]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Dec 2024 09:13:58 -0800 Message-ID: Date: Thu, 19 Dec 2024 09:13:57 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 00/10] Account page tables at all levels To: Kevin Brodsky , linux-mm@kvack.org Cc: Andrew Morton , Catalin Marinas , Dave Hansen , Linus Walleij , Andy Lutomirski , Peter Zijlstra , "Mike Rapoport (IBM)" , Ryan Roberts , Thomas Gleixner , Will Deacon , Matthew Wilcox , linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-um@lists.infradead.org, loongarch@lists.linux.dev, x86@kernel.org References: <20241219164425.2277022-1-kevin.brodsky@arm.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-Stat-Signature: z9a9bp395exgf4phu4x6t4f59cbhgcm6 X-Rspam-User: X-Rspamd-Queue-Id: 23800180016 X-Rspamd-Server: rspam08 X-HE-Tag: 1734628435-823093 X-HE-Meta: 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 V2lNpLH2 X5bHmS1X4BUgFMekUXVhGKnXzplxeuLOgROMH8ok1OMAEDIZ/Fwa1dS2VasRqnoWPBrP5kJFbSBjX2OH++Vyokzs+cVNxmB7cWKW5hdwjuZJxvRquZMqEn6i8VenssQMgwTgx+5AZ/QaKTfj1bEJy4U7RCGNHwVh8vyC9qfFqSdxYoWWxUC67SArEoa+hkVC5En4TrrVs2UkOUh7UrMaRLXxnb5HIbrdlQQiS X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 12/19/24 08:44, Kevin Brodsky wrote: > +---------------+-------------------------+-----------------------+--------------+------------------------------------+ > | x86 | Y | Y | Y/N | kmem_cache at pgd level if PAE | > +---------------+-------------------------+-----------------------+--------------+------------------------------------+ This is a really rare series that adds functionality _and_ removes code overall. It looks really good to me. The x86 implementation seems to be captured just fine in the generic one: Acked-by: Dave Hansen One super tiny nit is that the PAE pgd _can_ be allocated using __get_free_pages(). It was originally there for Xen, but I think it's being used for PTI only at this point and the comments are wrong-ish. I kinda think we should just get rid of the 32-bit kmem_cache entirely.