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Message-Id: <20220519183127.3909598-2-shiyn.lin@gmail.com>
Date: Fri, 20 May 2022 02:31:22 +0800
From: Chih-En Lin <shiyn.lin@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org
Cc: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Steven Rostedt <rostedt@...dmis.org>,
Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
Daniel Bristot de Oliveira <bristot@...hat.com>,
Christian Brauner <brauner@...nel.org>,
"Matthew Wilcox (Oracle)" <willy@...radead.org>,
Vlastimil Babka <vbabka@...e.cz>,
William Kucharski <william.kucharski@...cle.com>,
John Hubbard <jhubbard@...dia.com>,
Yunsheng Lin <linyunsheng@...wei.com>,
Arnd Bergmann <arnd@...db.de>,
Suren Baghdasaryan <surenb@...gle.com>,
Chih-En Lin <shiyn.lin@...il.com>,
Colin Cross <ccross@...gle.com>,
Feng Tang <feng.tang@...el.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Mike Rapoport <rppt@...nel.org>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Anshuman Khandual <anshuman.khandual@....com>,
"Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
Daniel Axtens <dja@...ens.net>,
Jonathan Marek <jonathan@...ek.ca>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Pasha Tatashin <pasha.tatashin@...een.com>,
Peter Xu <peterx@...hat.com>,
Andrea Arcangeli <aarcange@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Andy Lutomirski <luto@...nel.org>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
Fenghua Yu <fenghua.yu@...el.com>,
David Hildenbrand <david@...hat.com>,
linux-kernel@...r.kernel.org, Kaiyang Zhao <zhao776@...due.edu>,
Huichun Feng <foxhoundsk.tw@...il.com>,
Jim Huang <jserv.tw@...il.com>
Subject: [RFC PATCH 1/6] mm: Add a new mm flag for Copy-On-Write PTE table
Add MMF_COW_PGTABLE flag to prepare the subsequent implementation of
copy-on-write for the page table.
Signed-off-by: Chih-En Lin <shiyn.lin@...il.com>
---
include/linux/sched/coredump.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/sched/coredump.h b/include/linux/sched/coredump.h
index 4d9e3a656875..19e9f2b71398 100644
--- a/include/linux/sched/coredump.h
+++ b/include/linux/sched/coredump.h
@@ -83,7 +83,10 @@ static inline int get_dumpable(struct mm_struct *mm)
#define MMF_HAS_PINNED 28 /* FOLL_PIN has run, never cleared */
#define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP)
+#define MMF_COW_PGTABLE 29
+#define MMF_COW_PGTABLE_MASK (1 << MMF_COW_PGTABLE)
+
#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\
- MMF_DISABLE_THP_MASK)
+ MMF_DISABLE_THP_MASK | MMF_COW_PGTABLE_MASK)
#endif /* _LINUX_SCHED_COREDUMP_H */
--
2.36.1
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