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[2003:d8:2f4e:3200:c99d:a38b:3f3a:d4b3]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-47496c2c9dasm13567195e9.4.2025.10.21.03.06.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Oct 2025 03:06:11 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, David Hildenbrand , Andrew Morton , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , stable@vger.kernel.org Subject: [PATCH v1 2/2] powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating pages Date: Tue, 21 Oct 2025 12:06:06 +0200 Message-ID: <20251021100606.148294-3-david@redhat.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251021100606.148294-1-david@redhat.com> References: <20251021100606.148294-1-david@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: wcaNphu8htyNOhhAet5yQkKTr3f63wAF0B4C0uEPxfk_1761041172 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 6C9EB180006 X-Stat-Signature: iu9p7husugndcs5do5sdsjzhzq1tqoke X-Rspam-User: X-HE-Tag: 1761041175-149121 X-HE-Meta: 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 J/srZ9IL 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 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: Let's properly adjust BALLOON_MIGRATE like the other drivers. Note that the INFLATE/DEFLATE events are triggered from the core when enqueueing/dequeueing pages. Not completely sure whether really is stable material, but the fix is trivial so let's just CC stable. This was found by code inspection. Fixes: fe030c9b85e6 ("powerpc/pseries/cmm: Implement balloon compaction") Cc: Signed-off-by: David Hildenbrand --- arch/powerpc/platforms/pseries/cmm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c index 688f5fa1c7245..310dab4bc8679 100644 --- a/arch/powerpc/platforms/pseries/cmm.c +++ b/arch/powerpc/platforms/pseries/cmm.c @@ -532,6 +532,7 @@ static int cmm_migratepage(struct balloon_dev_info *b_dev_info, spin_lock_irqsave(&b_dev_info->pages_lock, flags); balloon_page_insert(b_dev_info, newpage); + __count_vm_event(BALLOON_MIGRATE); b_dev_info->isolated_pages--; spin_unlock_irqrestore(&b_dev_info->pages_lock, flags); -- 2.51.0