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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F0E1C433F5 for ; Mon, 30 May 2022 09:55:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234976AbiE3Jy6 (ORCPT ); Mon, 30 May 2022 05:54:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232856AbiE3Jyz (ORCPT ); Mon, 30 May 2022 05:54:55 -0400 Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D816470379 for ; Mon, 30 May 2022 02:54:53 -0700 (PDT) Received: from [192.168.1.107] ([37.4.249.170]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MzR0i-1nZWsg40rQ-00vMSe; Mon, 30 May 2022 11:54:15 +0200 Message-ID: <69590289-58ef-d32b-0459-36fa00627605@i2se.com> Date: Mon, 30 May 2022 11:54:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: vchiq: Performance regression since 5.18-rc1 Content-Language: en-US To: Marcelo Tosatti , Sebastian Andrzej Siewior Cc: Andrew Morton , Nicolas Saenz Julienne , Borislav Petkov , Minchan Kim , Matthew Wilcox , Mel Gorman , Juri Lelli , Thomas Gleixner , "Paul E. McKenney" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linux ARM , Phil Elwell , regressions@lists.linux.dev References: <77d6d498-7dd9-03eb-60f2-d7e682bb1b20@i2se.com> From: Stefan Wahren In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:r+ADtDFbqXY818140nc+F8gIG28Nz1VhevBnDdrLMd7MaSkBizD KdE2mmQyEo9EeZHtC63h/WwzVF3428nDz1BAOLgF5h94I6QCW1dBI4uLM5m8rUd8h5Obkst 3muxmf2kTrb3Yko5a9KehM+mTxjOk5CQyB8ytfNwQ1hyirAmQzQQ6mP5p94Ho1omDIWCscW WkKK8A0KhsEPpUqCMcR0w== X-UI-Out-Filterresults: notjunk:1;V03:K0:SzBOm+0D5lQ=:PK2pxYWDZLNiPfO51WKBNJ Ejdp9ND3c3zYyp16XAqUKBdSCt0xTNQY0hVMtVLDVw56LbOV3AVn2eiGoe/d1t2utOq8XCpkk OWmi0vCbmj9f1Zjbkh6UB+KvXg5uMpK9VmZKroctg79AGc+hGnH9EFrfg0LeQC2p5RoasZFgW rGzoAmggL+O/FrIGNcv5AhVuYYrzN0CHWfB2jTEOhreGKIkGe9K6m4ZfEK91ucsrUziHHOC87 hKdRRJzBwVaYeXbY0LvZczSnEFJMkeUvNmdijsorT9mdIPGpzulJ1+t88P8QpvEJdyP9INRKQ 6ZkbNjH1TQI01L6eHWj+2eDevbxSiVz7OmV0EyzCGlUPf87yoLADUnoJ4keniScVoR9JNHtFv NWsxh8WX4YxsAhmCiW9fX1cmVLRU4Y/EpTvyOJ5Ot0C3VVfLXR/I/rd8smSrKBX+7TLS/ZgaI LTt3fOlUivQRTJZQBc9AyVQqVNGNy/ysPBh/Wk4FQLcq2TIOWB21+hxV0SUNU8ymeqQkGyOTL pF5Hlu1EFilpUXVpiP8k2Qw6Tuig9vpqNhRcQfeQVtHvDtKW/QgK8E1Sgw7jTn70I3pSSSts7 z0/4Orb9/e7xEUEG62PcRZ0WVdRYRy88UjUiVQzRDtsBn1atUOztuQA3OdeR24EngTCZ1kESQ 0cuMQDvKF0TMaj3uxntqFzs/+xsNOThX6+dJIosDtVn2QLLGN1sU+oh4u/iqs+ooXVQjJ/92e pmYUXlPyPkJg947cspMt+O5AiDvqyd1Q6AOghKpD9fMuCm8tYNlNUOSUe4U= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Marcelo, hi Sebastian, Am 25.05.22 um 15:56 schrieb Marcelo Tosatti: > On Mon, May 23, 2022 at 09:09:07AM +0200, Sebastian Andrzej Siewior wrote: >> On 2022-05-22 01:22:00 [+0200], Stefan Wahren wrote: >>> Hi, >> Hi, >> >>> while testing the staging/vc04_services/interface/vchiq_arm driver with my >>> Raspberry Pi 3 B+ (multi_v7_defconfig) i noticed a huge performance >>> regression since [ff042f4a9b050895a42cae893cc01fa2ca81b95c] mm: >>> lru_cache_disable: replace work queue synchronization with synchronize_rcu >>> >>> Usually i run "vchiq_test -f 1" to see the driver is still working [1]. >> What about >> https://lore.kernel.org/all/YmrWK%2FKoU1zrAxPI@fuller.cnet/ >> >> Sebastian > Stefan, > > Can you please try the patch above ? this patch fixes the regression. Great Best regards > > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel