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Wed, 12 Mar 2025 00:08:07 +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 B44AA1955DDD; Wed, 12 Mar 2025 00:08:00 +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 5/5] xen: balloon: update the NR_BALLOON_PAGES state Date: Tue, 11 Mar 2025 18:07:00 -0600 Message-ID: <20250312000700.184573-6-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-Rspamd-Server: rspam07 X-Rspam-User: X-Stat-Signature: 33m6tc1iq5fdiojiy9c1w1t3jw57xy3w X-Rspamd-Queue-Id: 37C1FA0007 X-HE-Tag: 1741738095-850610 X-HE-Meta: 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 UHREhp/T NPosAzkHuV1FWyMPDhKs6bkMosAyO+8hOA1n30qpY50o5M+Xp7MqR//L9arwEx92sPXkHKcvfuWrcYZl3OctbJ3ZJyxTnZJLc3ECKXmWpQPwjuqrBMvv7I50nVnZj5jfNc0dTo+cm7JMo6wzF1dhVsMgt6llT26XGFYEI8UHIuD0XBmfdyga6cRoEnAqewHXyiemaliytV0mCmccdW9UcG1QEtgbXlCbHr3CLXJJ1XiLDvvJimyiJPW/ir3SeewqnTLIN+cCnGnZCcoJrgt8nQ8RV5jo7R/zO7p7vnirDhgvYpCHgG2wVz6xc7UA9fZfGWL5f8GUPmfu4clitrPYmbUN6zs4SQoIsuLjdvVvnmNJGfOiLLNSyW8k30A== 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 Xen balloon. Signed-off-by: Nico Pache --- drivers/xen/balloon.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 163f7f1d70f1..65d4e7fa1eb8 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -157,6 +157,8 @@ static void balloon_append(struct page *page) list_add(&page->lru, &ballooned_pages); balloon_stats.balloon_low++; } + inc_node_page_state(page, NR_BALLOON_PAGES); + wake_up(&balloon_wq); } @@ -179,6 +181,8 @@ static struct page *balloon_retrieve(bool require_lowmem) balloon_stats.balloon_low--; __ClearPageOffline(page); + dec_node_page_state(page, NR_BALLOON_PAGES); + return page; }