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b=HtNX58a/tSIDk8w+CiRfG+uyCqk6W9935tHeKXz6YCrbVb85fakiGpQ09N4BTtw0/ kr70kIdHjuZETsFlKhcgjpFc6OYxanEg0qHkvDDZtyM1mGNaQiHga6Z0nhYO7UNKSd IwxDoPQ1oBM7NxeaXtYcnkULDiycrIBQntzj0TQ7CyDAwNx05Fac+jJRMi0NKjYilr xw7F2VNs40zDXbne5VwaRnVORXWItFMFCCRzCsvXjSHfTvjxKQEyz0ZUxuDAQNJJef ShT29tCp+BPJgLMc4djicSDhIEMeqD1CU9PnQs7lx/0kg057ZNjw6IpKZ6VcBaRAo4 2AzkLuFTwd+Hw== Message-ID: <731d7324-4eb7-44d2-bb7d-62b6fbe11c52@kernel.org> Date: Fri, 8 May 2026 10:23:11 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/balloon: expose per-node balloon pages in node meminfo To: Hao Ge , Andrew Morton Cc: linux-mm@kvack.org, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org References: <20260508015316.25722-1-hao.ge@linux.dev> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+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: <20260508015316.25722-1-hao.ge@linux.dev> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: C7597100012 X-Stat-Signature: jo1sr4bhjzguaakoztu1pz8m9xjz9dro X-Rspam-User: X-HE-Tag: 1778228597-589569 X-HE-Meta: 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 01aVhoCt 0ukSKMmJarHow4xgM/ypdTzF6mw7dOTBfi3EAEm6Bs5qUJCdH/05LrTDn/Ts96lcWT6ZncIP/8FEylCkixXKAooQfaIBzZb1lOO4yXreBElsTMjaP+DDsJ/yHwmCQAgS+mUHnirR1c7043+vj3uhoirFewMI/8z9tcmlTzb+Q72A/uVqbCHItdbyURWnvU0stI6mKE/4Ia8LijxTMfJIqKzZJAYKDf2ynBYTvAGh60wz12g0jsY3ZKpGEYqq7zHz3KrMZ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 5/8/26 03:53, Hao Ge wrote: > Commit 835de37603ef ("meminfo: add a per node counter for balloon > drivers") added NR_BALLOON_PAGES and exposed it in /proc/meminfo. > However, the per-node view at /sys/devices/system/node/nodeX/meminfo > was not updated, even though the counter is already tracked per-node. > > Add it to node_read_meminfo() so users can see balloon usage per > NUMA node without having to parse the raw vmstat file. Using ballooning with vNUMA is rather rare. But sure, why not. > > Signed-off-by: Hao Ge > --- > drivers/base/node.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/base/node.c b/drivers/base/node.c > index d7647d077b66..53f4e51d6d82 100644 > --- a/drivers/base/node.c > +++ b/drivers/base/node.c > @@ -513,6 +513,7 @@ static ssize_t node_read_meminfo(struct device *dev, > "Node %d Slab: %8lu kB\n" > "Node %d SReclaimable: %8lu kB\n" > "Node %d SUnreclaim: %8lu kB\n" > + "Node %d Balloon: %8lu kB\n" > #ifdef CONFIG_TRANSPARENT_HUGEPAGE > "Node %d AnonHugePages: %8lu kB\n" > "Node %d ShmemHugePages: %8lu kB\n" > @@ -543,7 +544,8 @@ static ssize_t node_read_meminfo(struct device *dev, > node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)), > nid, K(sreclaimable + sunreclaimable), > nid, K(sreclaimable), > - nid, K(sunreclaimable) > + nid, K(sunreclaimable), > + nid, K(node_page_state(pgdat, NR_BALLOON_PAGES)) > #ifdef CONFIG_TRANSPARENT_HUGEPAGE > , > nid, K(node_page_state(pgdat, NR_ANON_THPS)), Shouldn't it be placed under "Unaccepted:", just like for /proc/meminfo? -- Cheers, David