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b=XCv+0zbxJCWB9S8DZY/9GMSMyU cfcbOw0SQU8sbEfECnt9FPtvpY2W/KFY2DYzWk1rba77uBj4Q3PBb7TzT/Q6I8HkT+soHPww9/r+X 8Y5r1qEVD7zgqLDbrnGt1RCvi7wTf0I0koiq/esLjgwl44VgWSqvh+Bqjzmo9JnYoV4YZnmoZNSE1 j5tb5rt2xDQCxiRK9tps4kOmvRCujW5M7ZUpeuBZsnOtI4BDYHKDvK8Lefomw5jf5vvAwuehdlX5V D8Os9B4a87PUMh3l0ref1mN/IKo0V7+CcA3pD1Yr0TkhwmvzzR6LnWFnaXHmR4aEf2wZSpLgfGcJX 0LpxPSOQ==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vH6Ni-00000009cTg-0tTN; Thu, 06 Nov 2025 20:14:54 +0000 From: "Matthew Wilcox (Oracle)" To: Andrew Morton Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org Subject: [PATCH 3/3] memory_hotplug: Optimise try_offline_memory_block() Date: Thu, 6 Nov 2025 20:14:50 +0000 Message-ID: <20251106201452.2292631-3-willy@infradead.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251106201452.2292631-1-willy@infradead.org> References: <20251106201452.2292631-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: F26E240010 X-Stat-Signature: 1m997d73o81r1uzqebu4eh9f1efosyzf X-Rspam-User: X-HE-Tag: 1762460101-78966 X-HE-Meta: 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 r8RaZsN9 Fhyc8KMrA03XB2c+/P5NQp/FQjlfNo0PWHBAK3BXMXHBbryDOISuvM92LvBDOWxw8o4wBHdu84bSCgAObXcEIMJFn1rOF6r3zKXMvhE4UxGNPiiSulZM+8c9aawegOObO6t9IqeeS3wxs6wRsBzTveK0NudKgOrZq3CkbecSKWE9L6qsmXNfpTUVuZiuJ2UiNDB4YvoiAg8CIuedev5NW25NrwidktwwxVM01pwLevBZpvIBdjwdLyVDQno3F8IIiYNYA78Cj2T0l8DYhhURPUV964wFR+Gx5jRXTxr8TVuxJk/jdRnPx2SfiMGaxNBC5tRU0/NSylSO6vn8igl9XgMRp1w== 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: Extract the zone number directly from the page instead of using the page's zone number to look up the zone and asking the zone what its number is. Signed-off-by: Matthew Wilcox (Oracle) --- mm/memory_hotplug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 0be83039c3b5..80713bdf13dc 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -2327,7 +2327,7 @@ static int try_offline_memory_block(struct memory_block *mem, void *arg) * by offlining code ... so we don't care about that. */ page = pfn_to_online_page(section_nr_to_pfn(mem->start_section_nr)); - if (page && zone_idx(page_zone(page)) == ZONE_MOVABLE) + if (page && page_zonenum(page) == ZONE_MOVABLE) online_type = MMOP_ONLINE_MOVABLE; rc = device_offline(&mem->dev); -- 2.47.2