From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A00B02652A2; Thu, 18 Jun 2026 14:30:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781793030; cv=none; b=R0k7u5HhsSq6LbLuyFLfNEcsPuepMomdZegYPn5haIvOoHL/5GPfcnBbAn7w+79AzBEcS3OhpbdOn+l44L/zKOkSbLinuv6lEAtKjER3bVckotX7Zk+i2pMgUX3bMZU64RQiFwwdEGS2WstjKWt7LoWJL3yODiS9m/o8K8e0j98= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781793030; c=relaxed/simple; bh=7vtR+TjrpHHmFHags4WZ6+/5p5KaBqxoHk0CbYvy0rs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=J4DorbsBKIHqZEKQN4wbcSUrDMv91RTYDGT5T/qD2Ai9ZdN2ieMJMloF5auTfdH46xzl30usudziW7i/VVJyhF53nyukXgnOg8o4doV/4DTtw/Ja1Ri4xpq+38wbNYxOEWpNoQqacCRB2wqJ+cIZuh0IjX+iNsFr4fzc6JdbPpc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YmvOiCQm; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YmvOiCQm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BAB111F000E9; Thu, 18 Jun 2026 14:30:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781793029; bh=7vtR+TjrpHHmFHags4WZ6+/5p5KaBqxoHk0CbYvy0rs=; 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> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6z2rqmo7b6m2rdhqurspwya25ps4dj7lctdygnmq3rn4xt6h3i@57kiiy72epgd> 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