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b=gJ/wHYZWmjAnsS3He+umgyBGh3lXE7LqBO2wQar2CpQwcIZcUos0uNYS0uKR8dHok l8oFMHm+egBkXULKDCa4uSFIEMkZN0ggf+as2JbayPk8eKMwiz3gILYnOZDwxxIzMR 9v1ALjYE+dDKjU6VWh3A7XyQWA/rhUe1Da4qLrdE= Date: Tue, 20 Feb 2024 09:30:11 -0800 From: Andrew Morton To: Mikhail Gavrilov Cc: Vlastimil Babka , Marco Elver , Andrey Konovalov , glider@google.com, dvyukov@google.com, eugenis@google.com, Oscar Salvador , Linux List Kernel Mailing , Linux Memory Management List Subject: Re: regression/bisected commit 773688a6cb24b0b3c2ba40354d883348a2befa38 make my system completely unusable under high load Message-Id: <20240220093011.bf84486d704c3814079c2aa0@linux-foundation.org> In-Reply-To: References: <91c50335-e7b6-4ae1-9dad-a0c990b52021@suse.cz> <20240219152836.11d36709c594e66fe3037f2d@linux-foundation.org> <7e31accb-db01-486f-afb8-18a3f5402d00@suse.cz> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 50EC240018 X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: sns6xzb47ey5okx6pjox5r7w61ccrwob X-HE-Tag: 1708450214-250387 X-HE-Meta: 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 cVxLIkcK ZMseUQhE1kqmSw3MM3CrkpIIIfw== 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 Tue, 20 Feb 2024 10:37:03 +0500 Mikhail Gavrilov wrote: > On Tue, Feb 20, 2024 at 4:50 AM Vlastimil Babka wrote: > > > > > > I'm all confused. > > > > > > 4434a56ec209 ("stackdepot: make fast paths lock-less again") was > > > mainlined for v6.8-rc3. > > > > Uh sorry, I just trusted the info that it's not merged and didn't verify > > it myself. Yeah, I can see it is there. > > > > Wait, I am talk about these two patches which is not merged yet: > [PATCH v2 1/2] stackdepot: use variable size records for non-evictable entries > [PATCH v2 2/2] kasan: revert eviction of stack traces in generic mode > https://lore.kernel.org/linux-mm/20240129100708.39460-1-elver@google.com/ A can move those into the 6.8-rc hotfixes queue, and it appears a cc:stable will not be required. However I'm not seeing anything in the changelogs to indicate that we're fixing a dramatic performance regression, nor why that regressions is occurring.