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([2a09:80c0:192:0:5dac:bf3d:c41:c3e7]) by smtp.gmail.com with ESMTPSA id d15-20020a05600c34cf00b0041897c6171dsm6036966wmq.16.2024.04.18.03.58.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 18 Apr 2024 03:58:21 -0700 (PDT) Message-ID: <02cfd9fb-5481-4ea1-9b43-b1aa24de82d1@redhat.com> Date: Thu, 18 Apr 2024 12:58:20 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] virtio_balloon: introduce oom-kill invocations To: zhenwei pi , linux-kernel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux.dev Cc: mst@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, akpm@linux-foundation.org References: <20240418062602.1291391-1-pizhenwei@bytedance.com> <20240418062602.1291391-2-pizhenwei@bytedance.com> From: David Hildenbrand 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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20240418062602.1291391-2-pizhenwei@bytedance.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 X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 211BF120012 X-Stat-Signature: fa45gb1r8wwdnznkn3rzq4nedyak9u8t X-HE-Tag: 1713437906-265635 X-HE-Meta: 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 +aGCnti2 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 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 18.04.24 08:26, zhenwei pi wrote: > When the guest OS runs under critical memory pressure, the guest > starts to kill processes. A guest monitor agent may scan 'oom_kill' > from /proc/vmstat, and reports the OOM KILL event. However, the agent > may be killed and we will loss this critical event(and the later > events). > > For now we can also grep for magic words in guest kernel log from host > side. Rather than this unstable way, virtio balloon reports OOM-KILL > invocations instead. > > Signed-off-by: zhenwei pi Acked-by: David Hildenbrand -- Cheers, David / dhildenb