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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F1F64CD5BB4 for ; Tue, 26 May 2026 07:56:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=j2VWht/h5yGShBUEzS+HKCJP5W7VL9KNvGon0gQ1GqU=; b=oSeQYmQDLP9Rk6adA6Kyhca4xV +H2ym8p0xdDmk/bwydjNQoTnevgMrWFgOnvRwEekPvAJ8Z790WCKo+qpt8e/gf2lNckr9RX5gU2Ue ty4U4J6A7aVQlkuOA17iX9u5TYsX3OabST2V+lgatwMHKboQNCqBncHPU3diHOqwQ4ebusF2PVy9y QetwlEZ1g9qyBzKblzLAZywavSJw5Gwiy/9qJqC4taYBM5z9ZsP5WYJ8y1xw98zToRIu8lrMIvcHg dr4QARlIB+RQSuuRjYGh2GSRWmtmMVbo1v9LLBiPShUL1A3Vm/PLce1iCILK7id9kxmvzZzTArhWS f6HWa8KA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wRmeI-00000001JuV-2b5O; Tue, 26 May 2026 07:56:26 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wRmeF-00000001Jtf-15X4 for linux-arm-kernel@lists.infradead.org; Tue, 26 May 2026 07:56:25 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1925216F3; Tue, 26 May 2026 00:56:14 -0700 (PDT) Received: from [10.164.19.7] (unknown [10.164.19.7]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A39FB3F7B4; Tue, 26 May 2026 00:56:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1779782179; bh=6hzmwGTSHEaB23fFB7ucXxNiSw0m1Yr4kYVhH9sPBlk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=f0E1fC40TQfywE5hwctAqYLLb+iyQKgjGBgeEyteNh1NRYKEPt6LHj3JW/6RtfygU LWBQL3f2e4m8jNT4r1Wim6XN++G6bIO/VnmXWIhtR0zR0oKOLl5dp+MIK1crrGwiOh A33o7d00SJobM3X00BTLuUcWl5uxeZu1Kdtg8vNc= Message-ID: Date: Tue, 26 May 2026 13:26:10 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/6] arm64/hugetlb: Extend batching of multiple CONT_PTE in a single PTE setup To: Wen Jiang , linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, will@kernel.org, akpm@linux-foundation.org, urezki@gmail.com Cc: baohua@kernel.org, Xueyuan.chen21@gmail.com, rppt@kernel.org, david@kernel.org, ryan.roberts@arm.com, anshuman.khandual@arm.com, ajd@linux.ibm.com, linux-kernel@vger.kernel.org, jiangwen6@xiaomi.com References: <20260522053146.83209-1-jiangwenxiaomi@gmail.com> <20260522053146.83209-2-jiangwenxiaomi@gmail.com> Content-Language: en-US From: Dev Jain In-Reply-To: <20260522053146.83209-2-jiangwenxiaomi@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260526_005623_430165_5E811B38 X-CRM114-Status: GOOD ( 12.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 22/05/26 11:01 am, Wen Jiang wrote: > From: "Barry Song (Xiaomi)" > > For sizes aligned to CONT_PTE_SIZE and smaller than PMD_SIZE, > we can batch CONT_PTE settings instead of handling them individually. Better wording: "we can handle CONT_PTE_SIZE groups together" > > Signed-off-by: Barry Song (Xiaomi) > Signed-off-by: Wen Jiang > Tested-by: Xueyuan Chen > --- > arch/arm64/mm/hugetlbpage.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c > index a42c05cf56408..c4d8b226126cb 100644 > --- a/arch/arm64/mm/hugetlbpage.c > +++ b/arch/arm64/mm/hugetlbpage.c > @@ -110,6 +110,12 @@ static inline int num_contig_ptes(unsigned long size, size_t *pgsize) > contig_ptes = CONT_PTES; > break; > default: > + if (size > 0 && size < PMD_SIZE && > + IS_ALIGNED(size, CONT_PTE_SIZE)) { > + contig_ptes = size >> PAGE_SHIFT; > + *pgsize = PAGE_SIZE; > + break; > + } > WARN_ON(!__hugetlb_valid_size(size)); > } > > @@ -359,6 +365,10 @@ pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags) > case CONT_PTE_SIZE: > return pte_mkcont(entry); > default: > + if (pagesize > 0 && pagesize < PMD_SIZE && > + IS_ALIGNED(pagesize, CONT_PTE_SIZE)) > + return pte_mkcont(entry); > + > break; > } > pr_warn("%s: unrecognized huge page size 0x%lx\n",