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Wed, 16 Apr 2025 06:51:52 -0700 (PDT) From: Johannes Weiner To: Andrew Morton Cc: Vlastimil Babka , Brendan Jackman , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] mm: two allocator fixes for 6.15 Date: Wed, 16 Apr 2025 09:45:38 -0400 Message-ID: <20250416135142.778933-1-hannes@cmpxchg.org> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 5E8761C0006 X-Rspam-User: X-Stat-Signature: 9c3paes1fn6ptetyriydz4ukifzxzp6x X-HE-Tag: 1744811514-546666 X-HE-Meta: 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 fVHE0G26 6Q7n5ssjK1JH3Kqy53cA3E5C12ENMp7TlIkv7uNS0TtvFFUFSiABFxV6dejNesF4Oye53/kgUGvLK3sOMaq978oCotHm3aogcyz9ei61lZLs0moqhSX7mVspb0sG0YZjF0EcCwSMvtOWs3SR0b3ECPJRjwp3+MSpd9JiLMiaMsaC4KqAoKp0GhYtcTa5CdUnTo/ROd0r/j5JG2HKLU4tjjbpvzJFC3GkA2TVOEEjv8MPbO1WxmwvEWB1gJ9Luc3D35e+5kvUdkM+nL7Rrupz/JRdfVt1uc10suuH4L8bLSOPIMfKhF7lHvPELZ8AJpLVhPxU5eOGNLMEv+X93kw9gybLtIa78G4KlrOUMUl3QuP6johKuSCUETR4WcEw06f+6cU9RXO+Gn3/dohI1lVpyJ0u/1fT6rHrQHOENsYPGzFDn9ROO8p4srB5X2/UfOSdxAFA8 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: Two fixes based on Vlastimil's review of the defrag_mode patches. #1 fixes a bug that can lead to memory deadlocks on high-CPU-count machines. This affects not just defrag_mode. #2 fixes an overreclaim issue when defrag_mode is enabled. Based on: commit 16176182efbf3dfce6dad18dcc8801164329d1c2 (akpm/mm-hotfixes-unstable) Author: Uros Bizjak Date: Fri Apr 4 12:24:37 2025 +0200 include/linux/mmzone.h | 2 -- mm/page_alloc.c | 12 ------------ mm/vmscan.c | 29 ++++++++++++++++++++++++++--- 3 files changed, 26 insertions(+), 17 deletions(-)