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Fri, 14 Mar 2025 21:38:28 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.80.88]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id CD5E61943582; Fri, 14 Mar 2025 21:38:22 +0000 (UTC) From: Nico Pache To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux.dev Cc: alexander.atanasov@virtuozzo.com, muchun.song@linux.dev, roman.gushchin@linux.dev, mhocko@kernel.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, jgross@suse.com, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, akpm@linux-foundation.org, mst@redhat.com, david@redhat.com, yosry.ahmed@linux.dev, hannes@cmpxchg.org, nphamcs@gmail.com, chengming.zhou@linux.dev, kanchana.p.sridhar@intel.com, llong@redhat.com, shakeel.butt@linux.dev Subject: [PATCH v2 3/4] hv_balloon: update the NR_BALLOON_PAGES state Date: Fri, 14 Mar 2025 15:37:56 -0600 Message-ID: <20250314213757.244258-4-npache@redhat.com> In-Reply-To: <20250314213757.244258-1-npache@redhat.com> References: <20250314213757.244258-1-npache@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Rspam-User: X-Rspamd-Queue-Id: 2C0C5A000C X-Rspamd-Server: rspam05 X-Stat-Signature: yydkesgnn13go5z7ueb58t35rmto33kc X-HE-Tag: 1741988317-117569 X-HE-Meta: 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 biK6ox4K BZez+mtx0Q5yDFSeK9BvCTuqcVhF/ej4yKDZsfiTDTGH4tMukHQD9TNFDXmI6govj+o9TNfeysJDjlUMKWNGoPLgsRfk7J7P1wfDxpN5dL92z8nRr/1eKjSOuwLWfr7GFHs1F 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 Hyper-V balloon. Signed-off-by: Nico Pache Reviewed-by: Michael Kelley --- drivers/hv/hv_balloon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index fec2f18679e3..2b4080e51f97 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1192,6 +1192,7 @@ static void free_balloon_pages(struct hv_dynmem_device *dm, __ClearPageOffline(pg); __free_page(pg); dm->num_pages_ballooned--; + mod_node_page_state(page_pgdat(pg), NR_BALLOON_PAGES, -1); adjust_managed_page_count(pg, 1); } } @@ -1221,6 +1222,7 @@ static unsigned int alloc_balloon_pages(struct hv_dynmem_device *dm, return i * alloc_unit; dm->num_pages_ballooned += alloc_unit; + mod_node_page_state(page_pgdat(pg), NR_BALLOON_PAGES, alloc_unit); /* * If we allocatted 2M pages; split them so we