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Wed, 12 Mar 2025 16:04:40 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFE29IOsL3if064ONRlZf/bCswPuk7JbIN/+ScTtHA6PhUNFhrt31PPwWl6SfPGyM46nmrjRUH8DQbWz44H/+M= X-Received: by 2002:a05:6902:2ec3:b0:e63:65bc:a173 with SMTP id 3f1490d57ef6-e6365bca293mr20489001276.41.1741820680678; Wed, 12 Mar 2025 16:04:40 -0700 (PDT) MIME-Version: 1.0 References: <20250312000700.184573-1-npache@redhat.com> <20250312000700.184573-2-npache@redhat.com> In-Reply-To: From: Nico Pache Date: Wed, 12 Mar 2025 17:04:14 -0600 X-Gm-Features: AQ5f1JrCck7ZrLXTjsNL6uP-21nbhhEyl_MT0WXZGBOwpNadq0-oKKZGcnVqKd4 Message-ID: Subject: Re: [RFC 1/5] meminfo: add a per node counter for balloon drivers To: David Hildenbrand Cc: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, jerrin.shaji-george@broadcom.com, bcm-kernel-feedback-list@broadcom.com, arnd@arndb.de, gregkh@linuxfoundation.org, mst@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, jgross@suse.com, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, akpm@linux-foundation.org, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, nphamcs@gmail.com, yosry.ahmed@linux.dev, kanchana.p.sridhar@intel.com, alexander.atanasov@virtuozzo.com X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: lMOvM2Cm2goFmjRpNmsWWKi3zO1QZf-PB3eUMXwKrjk_1741820681 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: 4sawumxoqm49watt6wei5pwqbfipb1br X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 909DF140009 X-Rspam-User: X-HE-Tag: 1741820683-568391 X-HE-Meta: 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 wtBIyI20 v096NN/LJeEk3E7v8iuMA6Zq7ZJrJcBfAX9dBbffcDEFVYVGlqT05zKX24wBes3x4Y6Dz2U05wg6lZdPBGw5KnvarGXtIo4t1JTAO6ZP3qIzj0HnswNC7dCIXQiH15ikdqPaiRNdoAsgEpz+gJFyoc+ZyJMNOV96L928RHsfn0mrSnQv8NDY5X6hI6+vF2oCdKuacaklKt9gzDuxkcNq/0/ybHn3Cdp4HCnmoyErsxbtTBHw2MG5JqS/YcNXfjIsWAiH6kjgA8vpXib3PWcYtG2hOMg== 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 Wed, Mar 12, 2025 at 4:19=E2=80=AFPM David Hildenbrand wrote: > > On 12.03.25 01:06, Nico Pache wrote: > > Add NR_BALLOON_PAGES counter to track memory used by balloon drivers an= d > > expose it through /proc/meminfo and other memory reporting interfaces. > > In balloon_page_enqueue_one(), we perform a > > __count_vm_event(BALLOON_INFLATE) > > and in balloon_page_list_dequeue > > __count_vm_event(BALLOON_DEFLATE); > > > Should we maybe simply do the per-node accounting similarly there? I think the issue is that some balloon drivers use the balloon_compaction interface while others use their own. This would require unifying all the drivers under a single api which may be tricky if they all have different behavior > > -- > Cheers, > > David / dhildenb >