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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 MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] 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 X-Rspamd-Queue-Id: 3AED240016 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: i9cin5xewoaqxgaxo7iipuhw9engu965 X-HE-Tag: 1700768386-191475 X-HE-Meta: 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 53m5nTaQ TTNnHHf5F+5beXe7j6YqtFJ3KwnIfV6ibMWabVPtK32CPM9HJrgi7ooMHZogmFzn6C+IAMDwNjzKUhfpv+3YXKj7FEYSqfzXOFR5rcZoL8w7ULjkOM38Q6+U/H0Iexd7b/SHaZIuAmrNwABKDmjuu7F3Cm+y6EEIe3KFW6C1so2mvWAGgK/GPCBtgwi13+WfbpgZ/3SRStF05zxcoJ0Vf6ZtiDViVm1iHily31nvG0Hq5EXia+wQAxl5QWNzDa8B81YoGj2CEKFdDxq+xvxCxn+2jGaQwj3SeEmrkB4YQNhQmFVFoBL+koN+WXkdGypnY4hlN6YJtgQ8arL33qdxdLeUceBa91OTS/t0EoBL3ipESu1veM52+u88i8ImWmPvC6uoORvqK4xvmd/DPxqbb+Z1AhQ+Lq2eqvdWqOHu05UCIGz0= 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: List-Subscribe: List-Unsubscribe: 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(-) Acked-by: Shakeel Butt