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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2D2CC433F5 for ; Tue, 5 Oct 2021 13:32:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A7F04611C3 for ; Tue, 5 Oct 2021 13:32:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235091AbhJENdx (ORCPT ); Tue, 5 Oct 2021 09:33:53 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3935 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234103AbhJENdx (ORCPT ); Tue, 5 Oct 2021 09:33:53 -0400 Received: from fraeml735-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4HNz2P5GFfz67bWP; Tue, 5 Oct 2021 21:29:17 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml735-chm.china.huawei.com (10.206.15.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Tue, 5 Oct 2021 15:32:01 +0200 Received: from [10.47.95.252] (10.47.95.252) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.8; Tue, 5 Oct 2021 14:32:00 +0100 Subject: Re: [PATCH v5 00/14] blk-mq: Reduce static requests memory footprint for shared sbitmap To: Jens Axboe , CC: , , , , References: <1633429419-228500-1-git-send-email-john.garry@huawei.com> From: John Garry Message-ID: <81d9e019-b730-221e-a8c0-f72a8422a2ec@huawei.com> Date: Tue, 5 Oct 2021 14:34:39 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.47.95.252] X-ClientProxiedBy: lhreml709-chm.china.huawei.com (10.201.108.58) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 05/10/2021 13:35, Jens Axboe wrote: >> Baseline is 1b2d1439fc25 (block/for-next) Merge branch 'for-5.16/io_uring' >> into for-next > Let's get this queued up for testing, thanks John. Cheers, appreciated @Kashyap, You mentioned that when testing you saw a performance regression from v5.11 -> v5.12 - any idea on that yet? Can you describe the scenario, like IO scheduler and how many disks and the type? Does disabling host_tagset_enable restore performance? From checking differences between those kernels, I don't see anything directly relevant in sbitmap support or in the megaraid sas driver. Thanks, John