From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7C43ACD3423 for ; Fri, 1 May 2026 19:08:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E605D6B0093; Fri, 1 May 2026 15:08:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DE9DC6B0095; Fri, 1 May 2026 15:08:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CFFD16B0096; Fri, 1 May 2026 15:08:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id BB0856B0093 for ; Fri, 1 May 2026 15:08:53 -0400 (EDT) Received: from smtpin21.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 5C9DDC1029 for ; Fri, 1 May 2026 19:08:53 +0000 (UTC) X-FDA: 84719788146.21.1872178 Received: from mailbackend.panix.com (mailbackend.panix.com [166.84.1.89]) by imf30.hostedemail.com (Postfix) with ESMTP id A1D2F80003 for ; Fri, 1 May 2026 19:08:51 +0000 (UTC) Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=panix.com header.s=panix header.b=uLrtLc67; spf=pass (imf30.hostedemail.com: domain of kenny@panix.com designates 166.84.1.89 as permitted sender) smtp.mailfrom=kenny@panix.com; dmarc=pass (policy=none) header.from=panix.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1777662531; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=avU2aeDiJudu6Ve+/fr/MPvICQS1Esrg1FU1yfrAa3A=; b=vlWTTTRYpGvQxKFc7P00cnVdagti0j5Iu8SiclU9TShnjhW6dZkDQJnuHgLNDws6PLav2A TphfnfUIWsvnx+I8OlpwJ/giOJh7j8nmlbG1BUxTaamCRnMnxuGmZzdvAaN6YLbT0tcsIr 9EIBkMp5h16MX5LPpeBjEFWb5DoyYXY= ARC-Authentication-Results: i=1; imf30.hostedemail.com; dkim=pass header.d=panix.com header.s=panix header.b=uLrtLc67; spf=pass (imf30.hostedemail.com: domain of kenny@panix.com designates 166.84.1.89 as permitted sender) smtp.mailfrom=kenny@panix.com; dmarc=pass (policy=none) header.from=panix.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1777662531; a=rsa-sha256; cv=none; b=04aWMvd0nprHQvAysC9eMZhpORpZqfZcAObFWX29Gm6wiGAbxjCbiWXEUJjNgOK39uBUPx J5m0ueoT8dsV0hGFdSRK/buEhxzVuFteTEcjqJ3cZ79pv1jDkyLHEmOKTsLVMKnkVLO1+K nXR5tY/JL+QFBsTbS04AoHxohAVD9Tc= Received: from [10.50.4.26] (45-31-46-51.lightspeed.sndgca.sbcglobal.net [45.31.46.51]) by mailbackend.panix.com (Postfix) with ESMTPSA id 4g6gYs5wssz40Dc; Fri, 1 May 2026 15:08:49 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=panix.com; s=panix; t=1777662531; bh=l6JbYucB+9yD0k96T5o6k3yiniTY2VGeKOqZ7PJWN2I=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=uLrtLc67iWq4GSqPGwTJ4rzevu63TXdyY+tNy3yIoVxzTdPx+0fPodKpQqxhC4lNc QCHPB1S0lTSGcF0UU4nPVLMx1ZldiL+6j23fwwJohT2SBeEYi26JMpRWvIueKLSTyb EzfKFKOXzZUJmOYybDBlTJSczHHL4DxaWkFQioyw= Message-ID: Date: Fri, 1 May 2026 12:08:48 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: PATCH v4 0/6] mm, drm/ttm, drm/xe: Avoid reclaim/eviction loops under fragmentation To: Matthew Brost , intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: =?UTF-8?Q?Thomas_Hellstr=C3=B6m?= , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Kenneth C References: <20260430191809.2142544-1-matthew.brost@intel.com> <20260430191809.2142544-3-matthew.brost@intel.com> Content-Language: en-US From: Kenneth Crudup In-Reply-To: <20260430191809.2142544-3-matthew.brost@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: A1D2F80003 X-Rspamd-Server: rspam06 X-Stat-Signature: crpy3m7wadasnkk9tzsb35oixkafwpec X-HE-Tag: 1777662531-802392 X-HE-Meta: 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 ZFE/BI67 0Hphcu6CnWgZutuDYa5j4yFNL6lodRgV+JFdq+0Ld12dhMUwqFO/9n/KvVmJwzl4Saye/NtCET4Mi8q7jW0EDnLKHio46W6Oy4NmTsd0bPHn7eeTm/dCyJHD3xbOSdC0Z9oSQkrlTTEzQxELI8a/+BlEcYDn4tBFFCl5AIASmvt6u6IbiWhGxTLjZ7gI7d7PrT+tHBs2B+fPiNL9J86KEmgEWwJ/atMF+b3nYHc9P1T0tbUCtBDK0dUzqCQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 4/30/26 12:18, Matthew Brost wrote: > Introduce zone_maybe_fragmented_in_shrinker() as a lightweight helper to > allow subsystems to make coarse decisions about reclaim behavior in the > presence of likely fragmentation I'm running Linus' master on my LunarLake (258v) laptop, and sometimes after compiling a kernel (of all things) I'd see kswapd0 thrash despite having quite a bit of free memory. I finally traced it to the xe driver after seeing the "GPUActive" field in /proc/meminfo suddenly start rising, eventually growing larger than real memory by several times (see below). This patchset fixes the issue, and I'm sure there'll be a fix going into Linus' master soon, but what I'M wondering is how could building a kernel (which is just in a KDE Konsole running on Wayland) make the GPActive grow from ~1.6G to > 30G (and continue to rise, RN I'm seeing 91839848 kBs and still growing). -Kenny ---- SwapTotal: 33554428 kB MemTotal: 32345672 kB GPUActive: 652640 kB GPUReclaim: 403988 kB SwapTotal: 33554428 kB MemTotal: 32345672 kB GPUActive: 651180 kB GPUReclaim: 406812 kB SwapTotal: 33554428 kB MemTotal: 32345672 kB GPUActive: 659004 kB GPUReclaim: 399396 kB SwapTotal: 33554428 kB MemTotal: 32345672 kB GPUActive: 666996 kB GPUReclaim: 392764 kB GPUActive: 91832468 kB SwapTotal: 33554428 kB MemTotal: 32345672 kB GPUReclaim: 488000 kB GPUActive: 91832332 kB SwapTotal: 33554428 kB MemTotal: 32345672 kB GPUReclaim: 487988 kB GPUActive: 91869376 kB SwapTotal: 33554428 kB MemTotal: 32345672 kB GPUReclaim: 486504 kB ---- -- Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA