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Thu, 01 Sep 2022 10:36:13 -0700 (PDT) Date: Thu, 1 Sep 2022 10:35:08 -0700 In-Reply-To: <20220901173516.702122-1-surenb@google.com> Mime-Version: 1.0 References: <20220901173516.702122-1-surenb@google.com> X-Mailer: git-send-email 2.37.2.789.g6183377224-goog Message-ID: <20220901173516.702122-21-surenb@google.com> Subject: [RFC PATCH RESEND 20/28] mm: introduce per-VMA lock statistics 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@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, peterz@infradead.org, ldufour@linux.ibm.com, laurent.dufour@fr.ibm.com, paulmck@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, rientjes@google.com, axelrasmussen@google.com, joelaf@google.com, minchan@google.com, surenb@google.com, kernel-team@android.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; 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bh=r+vF5Lo2i1OjVhetiEIJ/9q6C9lfd71c3zrmx7NgTrs=; b=kPch6ZbXb0aNMXkqizTZ7xwXG9E21NA+/qtxQMqFilvq3CRwTRKeQBNSlsA8qZQVF0KjnH u1rMH+aJwbVClngWlmLEjdVLNkRYtKYgg6FYMIRq+rSjCqUiCEvRhv4GXgBy4C4nPMjdro /3f03QD60J63PFcQgqAkeHSJU4LTHUo= X-Rspamd-Queue-Id: 89D1614006C Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=H4jFJ8Dt; spf=pass (imf26.hostedemail.com: domain of 3je0QYwYKCMo8A7u3rw44w1u.s421y3AD-220Bqs0.47w@flex--surenb.bounces.google.com designates 209.85.128.202 as permitted sender) smtp.mailfrom=3je0QYwYKCMo8A7u3rw44w1u.s421y3AD-220Bqs0.47w@flex--surenb.bounces.google.com; dmarc=pass (policy=reject) header.from=google.com X-Rspam-User: X-Rspamd-Server: rspam01 X-Stat-Signature: m637wc8d8sf5dtr5f11zzzgqkqbsm6rr X-HE-Tag: 1662053774-51297 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: Add a new CONFIG_PER_VMA_LOCK_STATS config option to dump extra statistics about handling page fault under VMA lock. Signed-off-by: Suren Baghdasaryan --- include/linux/vm_event_item.h | 6 ++++++ include/linux/vmstat.h | 6 ++++++ mm/Kconfig.debug | 8 ++++++++ mm/vmstat.c | 6 ++++++ 4 files changed, 26 insertions(+) diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index f3fc36cd2276..a325783ed05d 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -150,6 +150,12 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, #ifdef CONFIG_X86 DIRECT_MAP_LEVEL2_SPLIT, DIRECT_MAP_LEVEL3_SPLIT, +#endif +#ifdef CONFIG_PER_VMA_LOCK_STATS + VMA_LOCK_SUCCESS, + VMA_LOCK_ABORT, + VMA_LOCK_RETRY, + VMA_LOCK_MISS, #endif NR_VM_EVENT_ITEMS }; diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index bfe38869498d..0c2611899cfc 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -131,6 +131,12 @@ static inline void vm_events_fold_cpu(int cpu) #define count_vm_vmacache_event(x) do {} while (0) #endif +#ifdef CONFIG_PER_VMA_LOCK_STATS +#define count_vm_vma_lock_event(x) count_vm_event(x) +#else +#define count_vm_vma_lock_event(x) do {} while (0) +#endif + #define __count_zid_vm_events(item, zid, delta) \ __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta) diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug index ce8dded36de9..075642763a03 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -207,3 +207,11 @@ config PTDUMP_DEBUGFS kernel. If in doubt, say N. + + +config PER_VMA_LOCK_STATS + bool "Statistics for per-vma locks" + depends on PER_VMA_LOCK + help + Statistics for per-vma locks. + If in doubt, say N. diff --git a/mm/vmstat.c b/mm/vmstat.c index 90af9a8572f5..3f3804c846a6 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1411,6 +1411,12 @@ const char * const vmstat_text[] = { "direct_map_level2_splits", "direct_map_level3_splits", #endif +#ifdef CONFIG_PER_VMA_LOCK_STATS + "vma_lock_success", + "vma_lock_abort", + "vma_lock_retry", + "vma_lock_miss", +#endif #endif /* CONFIG_VM_EVENT_COUNTERS || CONFIG_MEMCG */ }; #endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA || CONFIG_MEMCG */ -- 2.37.2.789.g6183377224-goog