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Mon, 29 Jan 2024 15:14:53 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Andrey Konovalov Date: Tue, 30 Jan 2024 00:14:38 +0100 Message-ID: Subject: Re: regression/bisected commit 773688a6cb24b0b3c2ba40354d883348a2befa38 make my system completely unusable under high load To: Mikhail Gavrilov Cc: Marco Elver , glider@google.com, dvyukov@google.com, eugenis@google.com, Oscar Salvador , Vlastimil Babka , Andrew Morton , Linux List Kernel Mailing , Linux Memory Management List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 5F893C0018 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: qg8tx9b1aice5s3hxa59uq4aapb6mbdh X-HE-Tag: 1706570095-172529 X-HE-Meta: U2FsdGVkX1/YZNV/F/YIu4w5fG6/oACDzrXln3MTLT2OLki3jZQNz2Ct3RT1VeO0go0gNSHhMTsZGInMIO5aoCbbNLoAE7tzSqJpe7odvzAzT1KUm8aVSJEuZrz+Dwf+XB7piHWTzW2WEixRhgEcll2jU/f2VYYL6Xn1oWZdBGkxwW5xBoS8ymSI8RXkshG9hcuAmP16Q/LnSJHb//PSzRhp8fuc41J3UGlSNQp7S5tURyM4d+kAAknOWWpyqpymeFyD/mVUNWIx3WhAWQvos59/o5eVsiAXvW/UQAIRJskFmi5ihahr02ftX8dDDqxm4QgVWMJ8OehsZv7vV4hXkE3U608x0W13spUFiCj4+AKOLHJskdiw7jtzRtAZdcEhktVPNasOLVD2i7/EQQgi1bbHTMbaRYMnzQ36BxlD1sQmW9tbySOmyrjhtFHeOA6a2lmd38dx6bUrf5Igzjc+B6ePUrBOQDy42TSUA+sLKT6atJhX0pkP8SojFli40jgPkckqWpShwU0EE6EOAH+EQUrXwFizz8uU8NPoUO7qOcpsW83+weKV807jfaXyrgg9TJXYeHLX2QBfFDtql6HwIrtP0oebAhks8855Lu39Rt/qKAgh/kUytIHksX6OwfVJnRWub+7Y6OAV6rIJPdtLn05oNTt0IGN1ewaGqkjRSNAtODvKlHjNeie9uxL2uryHurnEbxVRuY60yHnzOBr6PcBIAacxeVxWsRnaQ3O2CjQzo0bnEM46EXxcHh7YOSuVI34SYCmugb22PG5hnJjfwDom5baMpkG35UHpkanVa5hah15esu65/4OHGAm5AugHKplHbHMVuGJAifbN9ybSywhRkB/WmiS4d6COAoRQJz3eWmRqNnDUXfoHybO4U72nU+kHSjeBxhJFEvBO4c6ZqLCCwqwKAjSJBV2C5vSv0W0wa5SGh7AflvRd/zVp+O2h44snW2G27eXLWlYXoyV NlZwYb1g 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.026177, 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, Jan 29, 2024 at 11:25=E2=80=AFPM Mikhail Gavrilov wrote: > > On Fri, Jan 19, 2024 at 10:54=E2=80=AFPM Mikhail Gavrilov > wrote: > > > I continued to search regressions in 6.8 kernel. > And found another one. > > cc478e0b6bdffd20561e1a07941a65f6c8962cab is the first bad commit > commit cc478e0b6bdffd20561e1a07941a65f6c8962cab > Author: Andrey Konovalov > Date: Tue Jan 9 23:12:34 2024 +0100 > > kasan: avoid resetting aux_lock > > Here I spotted a dropped FPS in the game "Shadow of the Tomb Raider". > For measuring performance I used an internal benchmark. > Before commit cc478e0b6bdffd20561e1a07941a65f6c8962cab was 111FPS on > commit aaa2c9a97c22af5bf011f6dd8e0538219b45af88 [1]. > On commit cc478e0b6bdffd20561e1a07941a65f6c8962cab I has only 63FPS [2] > And unfortunately the stackdepot patchset which I applied on top of > 6.8-rc2 didn't restore initial performance [3]. > > [1] https://i.postimg.cc/tgvwPTkz/c11-aaa2c9a97c22af5bf011f6dd8e0538219b4= 5af88.png > [2] https://i.postimg.cc/pX8vHDCM/c10-cc478e0b6bdffd20561e1a07941a65f6c89= 62cab.png > [3] https://i.postimg.cc/hvWCb7dV/6-8-0-0-rc2-with-stackdepot.png Hi Mikhail, Please try to apply these two patches on top: https://lore.kernel.org/linux-mm/20240129100708.39460-1-elver@google.com/ They effectively revert the change you mentioned. Thank you for testing!