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From: Shakeel Butt To: JP Kobryn Cc: hannes@cmpxchg.org, yosryahmed@google.com, akpm@linux-foundation.org, rostedt@goodmis.org, linux-mm@kvack.org, cgroups@vger.kernel.org Subject: Re: [PATCH 2/2 v3] memcg: add flush tracepoint Message-ID: References: <20241029021106.25587-1-inwardvessel@gmail.com> <20241029021106.25587-3-inwardvessel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241029021106.25587-3-inwardvessel@gmail.com> X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Queue-Id: 4ADCE180011 X-Rspamd-Server: rspam01 X-Stat-Signature: j5u3afke5bx9ddjphtf3gzxqfy6eccey X-HE-Tag: 1730179647-443290 X-HE-Meta: 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 emdk7QYJ tVMA0mUcoqsvqlAfGUeWYqRcvs+lb925NTSBOqr5tZxpARUHDPEI7goVcqXPZYjAUPZGjajBfiiKvFGRSo+W0E80eapl7qilYzQHY5/ngI1GLB+0rcqbKe4eRhvbO4Yf9N/afVPExjmrFuVJjWk1YZDjgGvUqEPzXgSjZellcY8xY8Js= 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: On Mon, Oct 28, 2024 at 07:11:06PM GMT, JP Kobryn wrote: > This tracepoint gives visibility on how often the flushing of memcg stats > occurs and contains info on whether it was forced, skipped, and the value of > stats updated. It can help with understanding how readers are affected by > having to perform the flush, and the effectiveness of the flush by inspecting > the number of stats updated. Paired with the recently added tracepoints for > tracing rstat updates, it can also help show correlation where stats exceed > thresholds frequently. > > Signed-off-by: JP Kobryn Acked-by: Shakeel Butt