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Wed, 16 Nov 2022 07:48:02 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B624C11C050; Wed, 16 Nov 2022 07:48:02 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0110911C04C; Wed, 16 Nov 2022 07:47:57 +0000 (GMT) Received: from li-4a3a4a4c-28e5-11b2-a85c-a8d192c6f089.ibm.com (unknown [9.163.49.19]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Wed, 16 Nov 2022 07:47:56 +0000 (GMT) Date: Wed, 16 Nov 2022 08:47:53 +0100 From: Alexander Gordeev To: Linus Torvalds Cc: Hugh Dickins , Johannes Weiner , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Nadav Amit , Will Deacon , Aneesh Kumar , Nick Piggin , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Peter Zijlstra , Gerald Schaefer Subject: Re: [PATCH 4/4] mm: delay page_remove_rmap() until after the TLB has been flushed Message-ID: References: <20221109203051.1835763-1-torvalds@linux-foundation.org> <20221109203051.1835763-4-torvalds@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; 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dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf25.hostedemail.com: domain of agordeev@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=agordeev@linux.ibm.com X-Rspamd-Server: rspam09 X-HE-Tag: 1668584906-638950 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: On Wed, Nov 09, 2022 at 01:04:07PM -0800, Linus Torvalds wrote: Hi Linus, [...] > And I was so happy about sharing the s390 and UP case, and avoiding > any code being specific to s390. Which is what introduced this thing. Which actually brings a question whether CONFIG_MMU_GATHER_NO_GATHER mode could be beneficial for UP? But anyway, please find a follow-up series on top of mm-unstable with patches 1,2 aimed to avoid delayed_rmap flag on s390/UP and patches 3,4 hopefully cleaning things a bit (not so sure). > Linus Thanks!