From patchwork Thu Nov 23 19:39:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Rokosov X-Patchwork-Id: 13466744 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=salutedevices.com header.i=@salutedevices.com header.b="dvmOZBOq" Received: from mx1.sberdevices.ru (mx2.sberdevices.ru [45.89.224.132]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97CB1D43; Thu, 23 Nov 2023 11:39:47 -0800 (PST) Received: from p-infra-ksmg-sc-msk02 (localhost [127.0.0.1]) by mx1.sberdevices.ru (Postfix) with ESMTP id 8B11F120010; Thu, 23 Nov 2023 22:39:44 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.sberdevices.ru 8B11F120010 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=salutedevices.com; s=mail; t=1700768384; bh=3yNZRyHWMdnnlqHBz7P8oLgTMmMyWNxQ6iEoDg0G7sA=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=dvmOZBOqdWu3rS3gcaqdktBkeo0jLcSQM3wfFcsJheGAJUxm0HNz0wSIXCHXTOUad TKQ3dh8V4f3rZTWvFyy1vdvwTLoxVhkhp/WclxT8me8cF3FaI/KTH9MR4UZtATL9K1 lMzlk7woD6o6eokd/aev2ytEPBlbRcbkvEtG8YdMeWKBGCgQg5pLppUTLTV7NFIzN0 XRX5PnCLeFobjS87/I2mw2Qm2t0W5MxgoI6rC8yyRGuH2CKNHd1pjQUAVHUWqosAgK X023mS6oDLWKitT8ii1dEaCKQAPD+36KbNMpbuKNDMm/85MZkvSGRxsxevd8Qmp5HG tuMp2LOngGJeg== Received: from p-i-exch-sc-m01.sberdevices.ru (p-i-exch-sc-m01.sberdevices.ru [172.16.192.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.sberdevices.ru (Postfix) with ESMTPS; Thu, 23 Nov 2023 22:39:44 +0300 (MSK) Received: from localhost.localdomain (100.64.160.123) by p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Thu, 23 Nov 2023 22:39:44 +0300 From: Dmitry Rokosov To: , , , , , , , , CC: , , , , , , Dmitry Rokosov Subject: [PATCH v3 0/2] mm: memcg: improve vmscan tracepoints Date: Thu, 23 Nov 2023 22:39:35 +0300 Message-ID: <20231123193937.11628-1-ddrokosov@salutedevices.com> X-Mailer: git-send-email 2.36.0 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: p-i-exch-sc-m02.sberdevices.ru (172.16.192.103) To p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 181569 [Nov 23 2023] X-KSMG-AntiSpam-Version: 6.0.0.2 X-KSMG-AntiSpam-Envelope-From: ddrokosov@salutedevices.com X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 4 0.3.4 720d3c21819df9b72e78f051e300e232316d302a, {Tracking_uf_ne_domains}, {Tracking_from_domain_doesnt_match_to}, d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;100.64.160.123:7.1.2;lore.kernel.org:7.1.1;salutedevices.com:7.1.1;127.0.0.199:7.1.2;p-i-exch-sc-m01.sberdevices.ru:7.1.1,5.0.1, FromAlignment: s, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean, bases: 2023/11/23 18:34:00 X-KSMG-LinksScanning: Clean, bases: 2023/11/23 18:34:00 X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2023/11/23 17:02:00 #22509098 X-KSMG-AntiVirus-Status: Clean, skipped The motivation behind this commit is to enhance the traceability and understanding of memcg events. By integrating the function cgroup_ino() into the existing memcg tracepoints, this patch series introduces a new tracepoint template for the begin() and end() events. It utilizes a new entry field ino to store the cgroup ino, enabling developers to easily identify the cgroup associated with a specific memcg tracepoint event. Additionally, this patch series introduces new shrink_memcg tracepoints to facilitate non-direct memcg reclaim tracing and debugging. Changes v3 since v2 at [2]: - use cgroup_ino() instead of cgroup_name() for memcg tracepoints because cgroup_name() acquires a global rw_lock, which can potentially slow down the system - introduce a stub macro for each shrink_memcg tracepoint to avoid using ifdefs within the common vmscan code." Changes v2 since v1 at [1]: - change the position of the "memcg" parameter to ensure backward compatibility with userspace tools that use memcg tracepoints - add additional CONFIG_MEMCG ifdefs to prevent the use of memcg tracepoints when memcg is disabled Links: [1] https://lore.kernel.org/all/20231101102837.25205-1-ddrokosov@salutedevices.com/ [2] https://lore.kernel.org/all/20231123071945.25811-1-ddrokosov@salutedevices.com/ Dmitry Rokosov (2): mm: memcg: print out cgroup ino in the memcg tracepoints mm: memcg: introduce new event to trace shrink_memcg include/trace/events/vmscan.h | 95 ++++++++++++++++++++++++++++++----- mm/vmscan.c | 17 +++++-- 2 files changed, 95 insertions(+), 17 deletions(-)