From nobody Tue Apr 7 10:39:52 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14C0BECAAD4 for ; Mon, 29 Aug 2022 21:27:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229995AbiH2V1W (ORCPT ); Mon, 29 Aug 2022 17:27:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229862AbiH2V0q (ORCPT ); Mon, 29 Aug 2022 17:26:46 -0400 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E634D985A4 for ; Mon, 29 Aug 2022 14:26:16 -0700 (PDT) Received: by mail-pg1-x54a.google.com with SMTP id m34-20020a634c62000000b0042aff6dff12so4547542pgl.14 for ; Mon, 29 Aug 2022 14:26:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc; bh=bUksEMWzQ2sQtj6CAseSDP7Wnd3Y9YWuXlHuoAiHS/w=; b=R4f3AmhYQvfrJmCukv/e3Nij13PuVUa8k8O646df0PoObwBnO/xDcemk6+SqKXvVGr hJkm2649shhdYcclI4xYPbiKHXEe7XEvjq6ebwkp6YZFsZtQX3MH5xTV757BPS7Zeyib IALyiqYSG4f0kCJDHQ3+fMXa5F0OzkQKlh2EgahzIDAp6HMSPtfd8qN17COdyNthUkyK vH/w1n6XgnYHxRHIzAjyfQH31twkRddq+jpJViGP9dMWFd2ba2cwGPVTVH8mdAvdjCY4 84OD9xZ4r8HlzIfM65gveSjGxaILhsxn9vJXDz/VODVoOMzJt9RI4cwlcbKnFfX3PjSN BY7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc; bh=bUksEMWzQ2sQtj6CAseSDP7Wnd3Y9YWuXlHuoAiHS/w=; b=l/Y0aMF0B+iVY2xu5dVlCbcxy2dr5pCTArjwe9X0x3iaUN47Mi05RvDrVKwoN+9TcE pbJ0QoWJgbtvg13goGjeunHxUIXGY5Ai04qsYX8CCBh2l/Jx5FrFdpin4pkkNkfNBAcX ctKOiDhLjKWm22m+zkv9gIwS4WwFlXk9CjNDk5lxv3PbBnrZPEYhQjFqjX+IKW0wkaOw 4iVj16gulpQ1ygTGZpg0r+LsSFDIrJ3r68jzf6XLJMXcpz4AByGWcOxYulT3JV9kp9tZ Qibs6W6LiXClY2LFNscbCVsSo6T2WgB57UtR09eKFlWTWqWjh8MYaA2ltwKKenad2QX6 cuTA== X-Gm-Message-State: ACgBeo32bGo42XvCuDgrDzWFKlpuiuEtVQ1NuXP2YxmYVuu+ij1VMZ4E uDEItCgs1RNsru8zRn74UWN09dTwY58= X-Google-Smtp-Source: AA6agR4CSgZfYughTw1oP2TGtJ/Gx4qpWPKVumSGbjZh4UG9V5skHPeijnTVviS5CargVPsvloUs2cN/SRk= X-Received: from surenb-spec.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:3e30]) (user=surenb job=sendgmr) by 2002:a17:90b:2c11:b0:1fd:e56c:79de with SMTP id rv17-20020a17090b2c1100b001fde56c79demr4481996pjb.201.1661808371494; Mon, 29 Aug 2022 14:26:11 -0700 (PDT) Date: Mon, 29 Aug 2022 21:25:23 +0000 In-Reply-To: <20220829212531.3184856-1-surenb@google.com> Mime-Version: 1.0 References: <20220829212531.3184856-1-surenb@google.com> X-Mailer: git-send-email 2.37.2.672.g94769d06f0-goog Message-ID: <20220829212531.3184856-21-surenb@google.com> Subject: [RFC PATCH 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@techsingularity.net, 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, riel@surriel.com, 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 =20 +#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) =20 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. =20 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[] =3D { "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 */ --=20 2.37.2.672.g94769d06f0-goog