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[70.53.122.15]) by smtp.gmail.com with ESMTPSA id t69sm2821600qka.73.2020.08.21.16.50.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Aug 2020 16:50:08 -0700 (PDT) From: Peter Xu To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: "Maya B . Gokhale" , Linus Torvalds , Yang Shi , Marty Mcfadden , peterx@redhat.com, Kirill Shutemov , Oleg Nesterov , Jann Horn , Jan Kara , Kirill Tkhai , Andrea Arcangeli , Christoph Hellwig , Andrew Morton Subject: [PATCH 4/4] mm: Add PGREUSE counter Date: Fri, 21 Aug 2020 19:49:58 -0400 Message-Id: <20200821234958.7896-5-peterx@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200821234958.7896-1-peterx@redhat.com> References: <20200821234958.7896-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This accounts for wp_page_reuse() case, where we reused a page for COW. Signed-off-by: Peter Xu --- include/linux/vm_event_item.h | 1 + mm/memory.c | 1 + mm/vmstat.c | 1 + 3 files changed, 3 insertions(+) diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 2e6ca53b9bbd..18e75974d4e3 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -30,6 +30,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, PGFAULT, PGMAJFAULT, PGLAZYFREED, PGREFILL, + PGREUSE, PGSTEAL_KSWAPD, PGSTEAL_DIRECT, PGSCAN_KSWAPD, diff --git a/mm/memory.c b/mm/memory.c index cb9006189d22..148eafb8cbb1 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2622,6 +2622,7 @@ static inline void wp_page_reuse(struct vm_fault *vmf) if (ptep_set_access_flags(vma, vmf->address, vmf->pte, entry, 1)) update_mmu_cache(vma, vmf->address, vmf->pte); pte_unmap_unlock(vmf->pte, vmf->ptl); + count_vm_event(PGREUSE); } /* diff --git a/mm/vmstat.c b/mm/vmstat.c index e670f910cd2f..4f7b4ee6aa12 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1241,6 +1241,7 @@ const char * const vmstat_text[] = { "pglazyfreed", "pgrefill", + "pgreuse", "pgsteal_kswapd", "pgsteal_direct", "pgscan_kswapd", -- 2.26.2