From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6EDE931CA50 for ; Mon, 8 Sep 2025 18:45:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757357137; cv=none; b=Gk7BOWTc6MqO9AqErr2t0GojiFcRrcknWAIpyp4FG2NCQkZW8YTTaMcdACnF3zKZ/S+ElnyWUKUsrpI0OYEaDObsiUG9IM3+aZtR92kHQmdtoKb7ANwRQU7ukCORF240T0aeJLm+meD6g4MXVOSITiVkygKujUfDnLBc+2n2gcM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757357137; c=relaxed/simple; bh=u4634A0GpgrHa65LJw+AaevVl1eVSTRE0zlvp0/N79A=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=pLp6DOowkU1El6yGNqkv1M6OG85JIrABJgOfgs6cUJWEkkR5rTA2uaAxiWq5Ii7AwcURGFuqjkOObG6LMwV6vP0sN062FKjhUGnZWONmV4dFPZsGzPg0jSN5c/4bLTTDh+ku6kthyLZfSuL1cSYxTXcYQDuAP+Zym/VK3b2QjPw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=atM+x1QP; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="atM+x1QP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1757357135; h=from:from: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:autocrypt:autocrypt; bh=CZ1U0+nto9ykqfQPo7HpxxJzqiGtL77TvIiUKaOMOeM=; b=atM+x1QPEOhL/+n9ifJwPdqj9r2YVswjCJzHonahWQS0HKPS6r5djVcPRqvn0Km1gMXnSW vfuci1PkWvppH825uN6EI5aI3+XcWP2ii0MZWXtRVkeYM0z7xkLeBOzZhyHoqaU9EhjfW4 2WcOf9KoqdW191eYfhof4MJ/BWUlBSs= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-151-j_pzQ3HCOtGQYgw7SZjZFQ-1; Mon, 08 Sep 2025 14:45:33 -0400 X-MC-Unique: j_pzQ3HCOtGQYgw7SZjZFQ-1 X-Mimecast-MFC-AGG-ID: j_pzQ3HCOtGQYgw7SZjZFQ_1757357132 Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-45b9912a07dso29413705e9.3 for ; Mon, 08 Sep 2025 11:45:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757357132; x=1757961932; h=content-transfer-encoding:in-reply-to:autocrypt:content-language :from:references:cc:to:subject:user-agent:mime-version:date :message-id:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=CZ1U0+nto9ykqfQPo7HpxxJzqiGtL77TvIiUKaOMOeM=; b=AX1EnxevZCRnIXq7ZAGRdl+XyH+TR5aSExCwUHOL7ewECNXejr2xA5GIpsyvH1lzI6 9mbxMonQUVvKlLXbgbWMmCD4srkEBtmbRyuPVAP3zCfI5K8KJDuCpsUNlZj9hmQtioR3 lgEN0CBANv5k+gcI07YeZUrT1UBT1M2YUO2fu5+s6GI0jzkf3JdjKP+V7u/IjHLzz5hd JiSp41dmn1hkPP+T0jhJsrqIewWMvI2+0o8uWgG+ET3ayzMwb8ZZhTe8XQgg+mrqlJUH gFK6IRJMhSEdwpczQW49buTc0oHXasRfaj4Eie8zsoh6kO+LffMZ9BQmVWOB2GlZD2kT DqWg== X-Forwarded-Encrypted: i=1; AJvYcCXRJqX4OX2I+itHLkztelp1JoxX0sDb6fQORd1DE8Y6iIXSqWxx9jfwmN9hrVcLofQmu6Xm86t1vKY=@vger.kernel.org X-Gm-Message-State: AOJu0YzRcCimC2kpVbY6Mm+O7FNAKZAvwH3b9MZYm9iCm1uES4qgkFes C1a4de5aKP7RANT7x2dixVOEPN88mgcmLHiq9QBE2P/B+zNe0mRV8mJwst4Iv/CMNXKIwfHHNzl 2DTHDGe0vO/YWmfMdOuOCdDukwoi5tq15fUGv51N6QrBiY0yUrpC4Ct5JTcR8aQ== X-Gm-Gg: ASbGnctdcNcQTK8N/byo5HdicGqsKT9/ET1C+O+mBmW5efYRWSaIHx2wOiGyypPcWD6 mfAO3hW6Vmc3Hricmc7DtyR98Vg9bpZXgFtXuVBF2PUL7eu5s6uL87KsECMa1tGgaJr60/ERKv5 mlAAxr/K0g+TkZdhy8gxsn4BSpiipUeFdPMMs2L+9VWZdWSJc/iMB+pjcWlhaDFNnAenVeyVpBk RQX/WXcSqBXVA75yn82Og8GF6BZYm7OI0JkXVmjRshwiKkkr/J5NdYd+Z7/z6Qr5/NPZbNN+aEA AkhLOLYpNzg5DTvpU+78YT9g60bT0CI8Kefu8MQqqosCnCCD1rTD+eCx+m52VonTPedw/LXa0aA lP3s2u3/Lec48frf27XybvHdHibkJ/3HAIZsiNEPRellOMpnaMfRrn+erzm8FN6sz X-Received: by 2002:a05:600c:46ca:b0:459:d3ce:2cbd with SMTP id 5b1f17b1804b1-45de072e878mr66056905e9.13.1757357132101; Mon, 08 Sep 2025 11:45:32 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGl6W6PZgDJSOeT0hvE61lJkei0qub4EjvxomlpdB428UuZFOkk6zMkWPcWT58RiDXm1V4n4A== X-Received: by 2002:a05:600c:46ca:b0:459:d3ce:2cbd with SMTP id 5b1f17b1804b1-45de072e878mr66056435e9.13.1757357131588; Mon, 08 Sep 2025 11:45:31 -0700 (PDT) Received: from ?IPV6:2003:d8:2f25:700:d846:15f3:6ca0:8029? (p200300d82f250700d84615f36ca08029.dip0.t-ipconnect.de. [2003:d8:2f25:700:d846:15f3:6ca0:8029]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45de5180623sm34433125e9.0.2025.09.08.11.45.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 08 Sep 2025 11:45:30 -0700 (PDT) Message-ID: <5c43116f-fef9-426d-8c90-1a3a129f3d20@redhat.com> Date: Mon, 8 Sep 2025 20:45:28 +0200 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 06/22] mm/mshare: Add a vma flag to indicate an mshare region To: Anthony Yznaga , linux-mm@kvack.org Cc: akpm@linux-foundation.org, andreyknvl@gmail.com, arnd@arndb.de, bp@alien8.de, brauner@kernel.org, bsegall@google.com, corbet@lwn.net, dave.hansen@linux.intel.com, dietmar.eggemann@arm.com, ebiederm@xmission.com, hpa@zytor.com, jakub.wartak@mailbox.org, jannh@google.com, juri.lelli@redhat.com, khalid@kernel.org, liam.howlett@oracle.com, linyongting@bytedance.com, lorenzo.stoakes@oracle.com, luto@kernel.org, markhemm@googlemail.com, maz@kernel.org, mhiramat@kernel.org, mgorman@suse.de, mhocko@suse.com, mingo@redhat.com, muchun.song@linux.dev, neilb@suse.de, osalvador@suse.de, pcc@google.com, peterz@infradead.org, pfalcato@suse.de, rostedt@goodmis.org, rppt@kernel.org, shakeel.butt@linux.dev, surenb@google.com, tglx@linutronix.de, vasily.averin@linux.dev, vbabka@suse.cz, vincent.guittot@linaro.org, viro@zeniv.linux.org.uk, vschneid@redhat.com, willy@infradead.org, x86@kernel.org, xhao@linux.alibaba.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org References: <20250820010415.699353-1-anthony.yznaga@oracle.com> <20250820010415.699353-7-anthony.yznaga@oracle.com> From: David Hildenbrand Content-Language: en-US Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20250820010415.699353-7-anthony.yznaga@oracle.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 20.08.25 03:03, Anthony Yznaga wrote: > From: Khalid Aziz > > An mshare region contains zero or more actual vmas that map objects > in the mshare range with shared page tables. > > Signed-off-by: Khalid Aziz > Signed-off-by: Matthew Wilcox (Oracle) > Signed-off-by: Anthony Yznaga > --- Why can't we query the mapping instead? -- Cheers David / dhildenb