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Mon, 06 Feb 2023 19:54:47 -0800 (PST) From: Chih-En Lin To: Andrew Morton , Qi Zheng , David Hildenbrand , "Matthew Wilcox (Oracle)" , Christophe Leroy , John Hubbard , Nadav Amit , Barry Song Cc: Steven Rostedt , Masami Hiramatsu , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Yang Shi , Peter Xu , Vlastimil Babka , "Zach O'Keefe" , Yun Zhou , Hugh Dickins , Suren Baghdasaryan , Pasha Tatashin , Yu Zhao , Juergen Gross , Tong Tiangen , Liu Shixin , Anshuman Khandual , Li kunyu , Minchan Kim , Miaohe Lin , Gautam Menghani , Catalin Marinas , Mark Brown , Will Deacon , Vincenzo Frascino , Thomas Gleixner , "Eric W. Biederman" , Andy Lutomirski , Sebastian Andrzej Siewior , "Liam R. Howlett" , Fenghua Yu , Andrei Vagin , Barret Rhoden , Michal Hocko , "Jason A. Donenfeld" , Alexey Gladkov , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Dinglan Peng , Pedro Fonseca , Jim Huang , Huichun Feng , Chih-En Lin Subject: [PATCH v4 11/14] mm/migrate_device: Support COW PTE Date: Tue, 7 Feb 2023 11:51:36 +0800 Message-Id: <20230207035139.272707-12-shiyn.lin@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230207035139.272707-1-shiyn.lin@gmail.com> References: <20230207035139.272707-1-shiyn.lin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: D2DC11A0003 X-Rspam-User: X-Stat-Signature: 4tsf8a7416nm6zqzd3ucis6ph3t8tk6g X-HE-Tag: 1675742089-793222 X-HE-Meta: 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 lznLBUUz 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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: Break COW PTE before collecting the pages in COW-ed PTE. Signed-off-by: Chih-En Lin --- mm/migrate_device.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/migrate_device.c b/mm/migrate_device.c index 721b2365dbca..2930e591e8fc 100644 --- a/mm/migrate_device.c +++ b/mm/migrate_device.c @@ -106,6 +106,8 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp, } } + if (break_cow_pte_range(vma, start, end)) + return migrate_vma_collect_skip(start, end, walk); if (unlikely(pmd_bad(*pmdp))) return migrate_vma_collect_skip(start, end, walk); -- 2.34.1