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Mon, 06 Feb 2023 19:55:13 -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 13/14] events/uprobes: Break COW PTE before replacing page Date: Tue, 7 Feb 2023 11:51:38 +0800 Message-Id: <20230207035139.272707-14-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-Queue-Id: 18E2D1C0006 X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: 6emdpymesi386drnuztgnkahrbyykurb X-HE-Tag: 1675742114-797342 X-HE-Meta: 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 SCmBwV0F 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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 if we want to replace the page which resides in COW-ed PTE. Signed-off-by: Chih-En Lin --- kernel/events/uprobes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index d9e357b7e17c..2956a53da01a 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -157,7 +157,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr, struct folio *old_folio = page_folio(old_page); struct folio *new_folio; struct mm_struct *mm = vma->vm_mm; - DEFINE_FOLIO_VMA_WALK(pvmw, old_folio, vma, addr, 0); + DEFINE_FOLIO_VMA_WALK(pvmw, old_folio, vma, addr, PVMW_BREAK_COW_PTE); int err; struct mmu_notifier_range range; -- 2.34.1