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Wed, 12 Mar 2025 00:07:46 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.88.56]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 5DA631956094; Wed, 12 Mar 2025 00:07:38 +0000 (UTC) From: Nico Pache To: 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 Cc: 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, david@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 Subject: [RFC 2/5] virtio_balloon: update the NR_BALLOON_PAGES state Date: Tue, 11 Mar 2025 18:06:57 -0600 Message-ID: <20250312000700.184573-3-npache@redhat.com> In-Reply-To: <20250312000700.184573-1-npache@redhat.com> References: <20250312000700.184573-1-npache@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: AD7E1C0006 X-Stat-Signature: 936ektwmznzqbmyz7aphh9rytaczimr1 X-HE-Tag: 1741738075-261225 X-HE-Meta: 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 q3DVFox4 rY6T5onOFdJq+w43OdN0LZMbRj3SD5a/zS0cPjzb9UIOVdDrIpbTjJ+5/QNQPpsiJWTUq1QFWvGB6dcgu51qzM4cvQxbEz5U+UiIIoMya0R8fr7FQfVJupbHq+VbVFgJPeeZY9xfeareZ3kW+34lcsBl02g2rNF1wJvaqWJNqJOT7BsbG5N83whV5Jjv+QD60K1r9zmGNZ2g1fsPb4vWlpf3whd+GydASFj73+5yXOmbF8a+MMfov9B3Wk469VzMc7sG9n2A2FpDjG1LBj9ZtEAWwi+m4JE9G7QQxXEU2cFulacmCZziZZIDwbZlzM2Tts5RvJVQVwnIAY2aPvStZsxaY8/O8wB56/lJteuTv+7EivxTe8IqbWjpyJQmOwTUOhVWHAst2WcyOo49KmBJOmz4nMw== 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: Update the NR_BALLOON_PAGES counter when pages are added to or removed from the virtio balloon. Signed-off-by: Nico Pache --- drivers/virtio/virtio_balloon.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 89da052f4f68..406414dbb477 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -274,6 +274,8 @@ static unsigned int fill_balloon(struct virtio_balloon *vb, size_t num) set_page_pfns(vb, vb->pfns + vb->num_pfns, page); vb->num_pages += VIRTIO_BALLOON_PAGES_PER_PAGE; + mod_node_page_state(page_pgdat(page), NR_BALLOON_PAGES, + VIRTIO_BALLOON_PAGES_PER_PAGE); if (!virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_DEFLATE_ON_OOM)) adjust_managed_page_count(page, -1); @@ -324,6 +326,8 @@ static unsigned int leak_balloon(struct virtio_balloon *vb, size_t num) set_page_pfns(vb, vb->pfns + vb->num_pfns, page); list_add(&page->lru, &pages); vb->num_pages -= VIRTIO_BALLOON_PAGES_PER_PAGE; + mod_node_page_state(page_pgdat(page), NR_BALLOON_PAGES, + -VIRTIO_BALLOON_PAGES_PER_PAGE); } num_freed_pages = vb->num_pfns;