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bh=g+2R9wHJik/ujG7pbEIR7UB7BFuMmi7T4GQjwfs+Slo=; b=Qi3tRaGOFoNfAfZOXYc5BFe0C7UUqBaV5lquw1ZJ5toVViOcgpfIVIkTr+7eGAzQKM MiP476TRD9/Gi/YCUSfYwC5297Yn0h5OJDxPp9Uu6Sa2gAyo595Fkw6l4ZY2v9WpYUtw BzfrK1e+xzxgFiCKBufoFG82ZcyF2zKF9SS4h6ocgzSmE1I9TdB7AzqJGyKuwTus04/7 sh00bqtKsu/xqYKnQhvg2M7+LxogCzjf7wPFcyblIK0UGh1rDKwZC0ApTfxehir00NJn 5hefN49CeTJLtsRz0zpSedzMfHjoXkFxJMlJW9NAnAaieKokpa0HtDRzd0zjTgq2M3AS +rXg== X-Gm-Message-State: AO0yUKUfxcUdXcQOCiH92eidQJURQsAkgLjGfjpIVT/UmZ63e+T8j9J8 xkTTs7ZOjRQSnz5SvGXFY5aAjXV5YG8= X-Received: from surenb-desktop.mtv.corp.google.com ([2620:15c:211:200:f781:d5ed:1806:6ebb]) (user=surenb job=sendgmr) by 2002:a5b:144:0:b0:8ec:cc9b:7333 with SMTP id c4-20020a5b0144000000b008eccc9b7333mr463396ybp.205.1676524739514; Wed, 15 Feb 2023 21:18:59 -0800 (PST) Date: Wed, 15 Feb 2023 21:17:42 -0800 In-Reply-To: <20230216051750.3125598-1-surenb@google.com> Mime-Version: 1.0 References: <20230216051750.3125598-1-surenb@google.com> X-Mailer: git-send-email 2.39.1.581.gbfd45094c4-goog Message-ID: <20230216051750.3125598-28-surenb@google.com> Subject: [PATCH v3 27/35] mm: add FAULT_FLAG_VMA_LOCK flag From: Suren Baghdasaryan To: akpm@linux-foundation.org Cc: michel@lespinasse.org, jglisse@google.com, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, mgorman@techsingularity.net, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, peterz@infradead.org, ldufour@linux.ibm.com, paulmck@kernel.org, mingo@redhat.com, will@kernel.org, luto@kernel.org, songliubraving@fb.com, peterx@redhat.com, david@redhat.com, dhowells@redhat.com, hughd@google.com, bigeasy@linutronix.de, kent.overstreet@linux.dev, punit.agrawal@bytedance.com, lstoakes@gmail.com, peterjung1337@gmail.com, rientjes@google.com, chriscli@google.com, axelrasmussen@google.com, joelaf@google.com, minchan@google.com, rppt@kernel.org, jannh@google.com, shakeelb@google.com, tatashin@google.com, edumazet@google.com, gthelen@google.com, gurua@google.com, arjunroy@google.com, soheil@google.com, leewalsh@google.com, posk@google.com, michalechner92@googlemail.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org, kernel-team@android.com, Suren Baghdasaryan , Laurent Dufour X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757963786990959853?= X-GMAIL-MSGID: =?utf-8?q?1757963786990959853?= Add a new flag to distinguish page faults handled under protection of per-vma lock. Signed-off-by: Suren Baghdasaryan Reviewed-by: Laurent Dufour --- include/linux/mm.h | 3 ++- include/linux/mm_types.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 36172bb38e6b..3c9167529417 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -478,7 +478,8 @@ static inline bool fault_flag_allow_retry_first(enum fault_flag flags) { FAULT_FLAG_USER, "USER" }, \ { FAULT_FLAG_REMOTE, "REMOTE" }, \ { FAULT_FLAG_INSTRUCTION, "INSTRUCTION" }, \ - { FAULT_FLAG_INTERRUPTIBLE, "INTERRUPTIBLE" } + { FAULT_FLAG_INTERRUPTIBLE, "INTERRUPTIBLE" }, \ + { FAULT_FLAG_VMA_LOCK, "VMA_LOCK" } /* * vm_fault is filled by the pagefault handler and passed to the vma's diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 939f4f5a1115..212e7f923a69 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -1056,6 +1056,7 @@ enum fault_flag { FAULT_FLAG_INTERRUPTIBLE = 1 << 9, FAULT_FLAG_UNSHARE = 1 << 10, FAULT_FLAG_ORIG_PTE_VALID = 1 << 11, + FAULT_FLAG_VMA_LOCK = 1 << 12, }; typedef unsigned int __bitwise zap_flags_t;