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[2003:cb:c705:f100:af38:1d1f:66f4:48c7]) by smtp.gmail.com with ESMTPSA id bd26-20020a05600c1f1a00b003cf6c2f9513sm1462650wmb.2.2022.11.02.02.15.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Nov 2022 02:15:17 -0700 (PDT) Message-ID: Date: Wed, 2 Nov 2022 10:15:15 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: [PATCH 1/2] mm: Always compile in pte markers To: Peter Xu , linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Andrew Morton , Miaohe Lin , Huang Ying , HORIGUCHI NAOYA , Andrea Arcangeli References: <20221030214151.402274-1-peterx@redhat.com> <20221030214151.402274-2-peterx@redhat.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20221030214151.402274-2-peterx@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1667380521; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=jSXLOldyONaY9cgEaRNbBHRAqu0Rs7Nl/7vgOG7kHn8=; b=1ceN9PEw6bO1WXGfzZMLO9YD9WehUye00ZM70LV0LI1nin2KdtJ5WYZrq9oA/lYwPIpmav b/tSRVh7qAcI6Bwf+tw44DTMOkb4YEJ687Ch/EMbmIUoak0/xxITggh/0j7xN4qlarNscD rq2S93C9DNTMdR0JvXtCqwII1C2rxzI= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=OvCzHDNq; spf=pass (imf27.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1667380521; a=rsa-sha256; cv=none; b=F7hR07N+3YxgUlJXLCECbC/ZjavpEN56ybJwdTXnXg1EYjyp2unjIvGPwH6PEspYIXm8Os LnUtlDYmH8j3C1L3AotflzQ3AfV+xWPOaVU3TYGeEwGfIdeAv4OUwQUtXHbqfuVjYxobgT 7IJKpHORiK9hOr0FF1Yo8zdMQCjRWCQ= X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 224D640003 Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=OvCzHDNq; spf=pass (imf27.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com X-Stat-Signature: mbcbdkgeadsjy9b4fqfrmo56nxjfa77n X-HE-Tag: 1667380520-769243 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 30.10.22 22:41, Peter Xu wrote: > The PTE markers code is tiny and now it's enabled for most of the > distributions. It's fine to keep it as-is, but to make a broader use of > it (e.g. replacing read error swap entry) it needs to be there always > otherwise we need special code path to take care of !PTE_MARKER case. > > It'll be easier just make pte marker always exist. Use this chance to > extend its usage to anonymous too by simply touching up some of the old > comments, because it'll be used for anonymous pages in the follow up > patches. > > Reviewed-by: Huang Ying > Reviewed-by: Miaohe Lin > Signed-off-by: Peter Xu Acked-by: David Hildenbrand -- Thanks, David / dhildenb