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b=ULctXWJbVUAAGZMDutAkeqpU+T2GHmh030Kod3ExAXEDCQ2yJYeilyS7QEbN3n93A YSRVTqHXXfyriW3g118ZEH19wtan0CBV5iVm1AiGre09wqhmbNMSADIKXeaIxId7h3 35EHAcV9dF9BVmHBLlOQgHT09WZ/XfcDxzEBHOM8= Date: Mon, 22 Dec 2025 17:59:57 -0800 From: Andrew Morton To: Mathieu Desnoyers Cc: linux-kernel@vger.kernel.org, Mark Brown , linux-mm@kvack.org Subject: Re: [PATCH v1 0/5] MM_CID and HPCC mm_struct static init fixes Message-Id: <20251222175957.bfc9cf8b25e587f3f5e304bc@linux-foundation.org> In-Reply-To: <20251221232926.450602-1-mathieu.desnoyers@efficios.com> References: <20251221232926.450602-1-mathieu.desnoyers@efficios.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 9DC95A0009 X-Stat-Signature: 8go5zo4qcc64j8tj7h3htsypzgqu4m3o X-HE-Tag: 1766455198-870090 X-HE-Meta: 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 3iFCxB2r hjmZ5tqB3HGe4U1cFciflPuu/QtneJzwVPVqV229kyieZUPhgkT3YPBBkVJ6RYN5qgtGFktJDo1PcWPOKH1r+e1nDWeQskjjDf7lZyc1JaFpV5x6B7YR+/wx5x5Xe/Tf0OUn+7xJT9ZJoqXQbcrdCEymycqMAIkF6NwFH2NFR41fdw8luGSihxu+3e81dQGxSr3sXOUu5eVzfu1ipFjlR2F0a7nYAACXBcE5svrZjYlzCuNYcntIvOhjKsLUuvSigYeDV+oiqzrMPuuyB3sqggoCtp544jfVUTncq+mTAJ+o1EZ7LJf3OGmkx01mqGDVTq2oX8+KJScLyydxfyhxTGZLC35oOcN3bNUUkWciy2/8+bXhxfYi1mjPciV52TQqJ9J4x 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 Sun, 21 Dec 2025 18:29:21 -0500 Mathieu Desnoyers wrote: > Mark Brown reported a regression [1] on linux next due to the > hierarchical percpu counters (HPCC). You mentioned they were only in > mm-new (and therefore not pulled into -next) [2], but it looks like they > got more exposure that we expected. :) We try to please ;) Mark's report is why this series remains in mm-new and didn't get promoted to mm-unstable (and hence linux-next). Also, I anticipate a new version of this series thanks to https://lkml.kernel.org/r/2fb78e41-5e56-425f-925f-a29524355d2c@efficios.com > This bug hunting got me to fix static initialization issues in both > MM_CID (for upstream) and HPCC (mm-new). Mark tested my series and > confirmed that it fixes his issues. > > Please consider the HPCC fixes for mm-new, and the MM_CID fixes for > upstream. > > This series is based on mm-new > commit 287373d0b6ee ("selftests/mm: fix comment for check_test_requirements") Well, simply appending this series to your "mm: Fix OOM killer inaccuracy on large many-core systems, v10" will create an annoying bisection hole. Also, there are some cc:stable fixes in here which depend upon the presence of "mm: Fix OOM killer inaccuracy on large many-core systems" series, which is all backwards. So for now I'll toss this series in there for testing but I'll ask for a redo, please. - All cc:stable patches prepared in a standalone fashion against latest mainline. - Any non-cc:stable patches which fix things in current mm-new come next. Perhaps view these as preparation for "mm: Fix OOM killer inaccuracy on large many-core systems". - Then "mm: Fix OOM killer inaccuracy on large many-core systems, v11" which incorporates anything which didn't make it into the above two categories. That could be as many as three patch series. Thanks.