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h=Date:From:To:Cc:Subject:References:In-Reply-To; b=YmvOiCQmVodx2octUGvCQzdDxtNKbcJlmIqTU4tmDqF0lCZuux41OQnmCaMdopaax w3IWmQ+RS2UlAZ8d1rT5f5EG4J+UhpKlNTDxSjIfmQEpl9yQIiJojIhFrnzsQuutWa vkIz0VwtfcUx+OTEwIW0PYUS/iLM1Rwrz/oOthBVg/BwV8zubvXY3+WyBtOnHWZjA9 I2rZUYCXlCMhDxirUaziR5SJVUn8H4W+ilrHJ3/L85Q+h/2LCW4csITCJHi3h5SEps f0F4DZyNHwhfvcKgc56CSWIyioxXDBsUvwxRUsCNAHedjurK91mKzuhq5i7bYn3Srz YJAAOfMTFS3yA== Date: Thu, 18 Jun 2026 15:30:22 +0100 From: Lorenzo Stoakes To: Jan Kara Cc: kernel test robot , Frederick Mayle , oe-lkp@lists.linux.dev, lkp@intel.com, Andrew Morton , Kalesh Singh , David Hildenbrand , Matthew Wilcox , Suren Baghdasaryan , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [linux-next:master] [mm] 7b32f64bc5: pts.svt-av1.Preset13.Bosphorus4K.frames_per_second 45.8% regression Message-ID: References: <202606181547.617a6967-lkp@intel.com> <6z2rqmo7b6m2rdhqurspwya25ps4dj7lctdygnmq3rn4xt6h3i@57kiiy72epgd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6z2rqmo7b6m2rdhqurspwya25ps4dj7lctdygnmq3rn4xt6h3i@57kiiy72epgd> X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 3DF144001C X-Stat-Signature: iwqwhxcw6oawsytbri1g84psnjj4kn73 X-HE-Tag: 1781793030-621822 X-HE-Meta: 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 5ohhTfig laMjh/huVsATk/dJErhLXeT50ptYXb7qYFiReHP2J4H02mj/8Wz43XNoY4GuJVGAdavA5KliXildtjRvVhSHQHUikA0XGdnzd7Ir7C1labqOiNDfy57f8UodnOf+EHs6b7MrVITSL2EYjuQmVGeJxyZ4qf5Kp5BeEwtKB0fOVWKkp1jbCwr7CmFwCO1KJmlytQj4t7ZTs5rHcFxMOrWrJoJRFX8VNFKwTZKZO3rNI8IrnyNBf6qN1FQ+MQe1WgsxQapFpfQryqUM/4hWTGEuxOw4I0RJn8f58NkJmkrjWdogpKhPegLFI6Kb/Pw/doZ+XoLVN9xHkKqDty43GAkZ/BVQSqQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Jun 18, 2026 at 11:30:47AM +0200, Jan Kara wrote: > On Thu 18-06-26 16:00:42, kernel test robot wrote: > > Hello, > > > > kernel test robot noticed a 45.8% regression of pts.svt-av1.Preset13.Bosphorus4K.frames_per_second on: > > This one looks serious enough and real. It would be good to figure out what > happens in this benchmark that it benefits from the readahead across VMA > boundaries so much... I think a revert first no? This seems pretty huge for something that isn't key to the kernel, then a new attempt can be tried with this issue addressed perhaps? I seem to recall objecting to this in the past, had a look around and saw [0] which has some discussion I think specifically on the VMA boundaries thing. [0]:https://lore.kernel.org/linux-mm/CAC_TJvfG8GcwG_2w1o6GOTZS8tfEx2h9A91qsenYfYsX8Te=Bg@mail.gmail.com/ (Sorry to be naggy buuut :) - I see there wasn't maintainer [Matthew] signoff on this, we should really be in the habit of _requiring_ that for merge). Thanks, Lorenzo