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Tsirkin" , Jason Wang , Xuan Zhuo , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Zi Yan , SeongJae Park Subject: [PATCH v3 01/24] vmw_balloon: adjust BALLOON_DEFLATE when deflating while migrating Date: Tue, 20 Jan 2026 00:01:09 +0100 Message-ID: <20260119230133.3551867-2-david@kernel.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260119230133.3551867-1-david@kernel.org> References: <20260119230133.3551867-1-david@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: en8f71cqiofho9ycmd3f7dujr3kax9ja X-Rspam-User: X-Rspamd-Queue-Id: 179AA40012 X-Rspamd-Server: rspam08 X-HE-Tag: 1768863709-759279 X-HE-Meta: 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 +3OadUWJ X6GRk/iBzDBVaHzkGmugKKENMV4MBTelYPnGlJ7XZkoYmhvkLb4UXGt/3eM0DAajj3DwSbPIyRyByuvRPwlKKuawVIt1iukFnFbt6DQ69dD7Pvy8rk2745HmUn9LAPtiHb6urIXeWYvuxP6YfiJlNHkgbZgYHoH3dF4UN+CXjEr5WE268l0Z3if/kAVQOMBI35PRTX1BN1qazmQmGY/lqBmfRew7oFWYYH/hDr7O346WDMtteIeWS1IUZoxWIEvvcXh5NUvFkbmdfQQ3P55jolcVGZ9T9vGlBFxZdr6ewIz9EoNUuvX3zNwzQPIBP9cNjQWJnrQp8Ve7+XhY= 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: When we're effectively deflating the balloon while migrating a page because inflating the new page failed, we're not adjusting BALLOON_DEFLATE. Let's do that. This is a preparation for factoring out this handling to the core code, making it work in a similar way first. As this (deflating while migrating because of inflation error) is a corner case that I don't really expect to happen in practice and the stats are not that crucial, this likely doesn't classify as a fix. Reviewed-by: SeongJae Park Reviewed-by: Lorenzo Stoakes Acked-by: Michael S. Tsirkin Signed-off-by: David Hildenbrand (Red Hat) --- drivers/misc/vmw_balloon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index cc1d18b3df5ca..2cc34c4968fac 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -1818,6 +1818,8 @@ static int vmballoon_migratepage(struct balloon_dev_info *b_dev_info, if (status == VMW_BALLOON_SUCCESS) { balloon_page_insert(&b->b_dev_info, newpage); __count_vm_event(BALLOON_MIGRATE); + } else { + __count_vm_event(BALLOON_DEFLATE); } /* -- 2.52.0