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[2003:d8:2f3c:3f00:7177:eb0c:d3d2:4b0e]) by smtp.gmail.com with ESMTPSA id jh2-20020a05600ca08200b00410e6a6403esm17251wmb.34.2024.02.13.14.04.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 13 Feb 2024 14:05:01 -0800 (PST) Message-ID: <9e14adec-2842-458d-8a58-af6a2d18d823@redhat.com> Date: Tue, 13 Feb 2024 23:04:58 +0100 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 00/35] Memory allocation profiling Content-Language: en-US To: Suren Baghdasaryan , Michal Hocko Cc: akpm@linux-foundation.org, kent.overstreet@linux.dev, vbabka@suse.cz, hannes@cmpxchg.org, roman.gushchin@linux.dev, mgorman@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, corbet@lwn.net, void@manifault.com, peterz@infradead.org, juri.lelli@redhat.com, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, peterx@redhat.com, axboe@kernel.dk, mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, dennis@kernel.org, tj@kernel.org, muchun.song@linux.dev, rppt@kernel.org, paulmck@kernel.org, pasha.tatashin@soleen.com, yosryahmed@google.com, yuzhao@google.com, dhowells@redhat.com, hughd@google.com, andreyknvl@gmail.com, keescook@chromium.org, ndesaulniers@google.com, vvvvvv@google.com, gregkh@linuxfoundation.org, ebiggers@google.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, elver@google.com, dvyukov@google.com, shakeelb@google.com, songmuchun@bytedance.com, jbaron@akamai.com, rientjes@google.com, minchan@google.com, kaleshsingh@google.com, kernel-team@android.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, kasan-dev@googlegroups.com, cgroups@vger.kernel.org References: <20240212213922.783301-1-surenb@google.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 13.02.24 22:58, Suren Baghdasaryan wrote: > On Tue, Feb 13, 2024 at 4:24 AM Michal Hocko wrote: >> >> On Mon 12-02-24 13:38:46, Suren Baghdasaryan wrote: >> [...] >>> We're aiming to get this in the next merge window, for 6.9. The feedback >>> we've gotten has been that even out of tree this patchset has already >>> been useful, and there's a significant amount of other work gated on the >>> code tagging functionality included in this patchset [2]. >> >> I suspect it will not come as a surprise that I really dislike the >> implementation proposed here. I will not repeat my arguments, I have >> done so on several occasions already. >> >> Anyway, I didn't go as far as to nak it even though I _strongly_ believe >> this debugging feature will add a maintenance overhead for a very long >> time. I can live with all the downsides of the proposed implementation >> _as long as_ there is a wider agreement from the MM community as this is >> where the maintenance cost will be payed. So far I have not seen (m)any >> acks by MM developers so aiming into the next merge window is more than >> little rushed. > > We tried other previously proposed approaches and all have their > downsides without making maintenance much easier. Your position is > understandable and I think it's fair. Let's see if others see more > benefit than cost here. Would it make sense to discuss that at LSF/MM once again, especially covering why proposed alternatives did not work out? LSF/MM is not "too far" away (May). I recall that the last LSF/MM session on this topic was a bit unfortunate (IMHO not as productive as it could have been). Maybe we can finally reach a consensus on this. -- Cheers, David / dhildenb