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 DE367C433F5 for ; Wed, 22 Dec 2021 12:06:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244784AbhLVMG4 (ORCPT ); Wed, 22 Dec 2021 07:06:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57806 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235474AbhLVMGy (ORCPT ); Wed, 22 Dec 2021 07:06:54 -0500 Received: from mail-qk1-x743.google.com (mail-qk1-x743.google.com [IPv6:2607:f8b0:4864:20::743]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E98CC061574 for ; Wed, 22 Dec 2021 04:06:54 -0800 (PST) Received: by mail-qk1-x743.google.com with SMTP id p4so2021399qkm.7 for ; Wed, 22 Dec 2021 04:06:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:references:in-reply-to:mime-version:thread-index:date :message-id:subject:to:cc; bh=laESdEt0yedoEa+PzGZ5Tu/c2uK7yMkyL2UT6XU3jhQ=; b=F1CuXgwHPZUkCVghJBqvWPsTjXgNjMjgnO/hIpS/CfL+Cf5Qaw3624aMX88k4b5tbS /34pl3anYizOtYZcRr1c/YPRPrNIa0tJTcCWjZ+oeinmuyc96MeWiX0iKl962CQniLBL CKFfe0oC5cDmQP+LcVUSXez0Y+IhFL/11QoZc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:references:in-reply-to:mime-version :thread-index:date:message-id:subject:to:cc; bh=laESdEt0yedoEa+PzGZ5Tu/c2uK7yMkyL2UT6XU3jhQ=; b=Lxy53xmAqB0211NQha/8yldCO+VW1WRS/cFxDmfupt6Dkll7KPkGCxfne5mujEJbWv edvlzJHhAqwqExHqqjxLStQOStmaXYzW92YSlK3AjyOLsR4OAP6le71m4RaYV0zOviAl e/2ne4LrwGDWLnImp0pNF+dfQ2z1lW0cWkED681ya9c38XAd+2bS6b5C/LXTekEr3g65 gqBZAj8TTiHkTeXmkK34nwiKg5UIV1wzHJmTsWE7J397OJZgcEqWoWISvwXzoPQ3aJsz OP6BcdU8TQSWgl3beEKUIQVdAQqlk4EdQIHBoLYoyW8v4BHy4CjFEM41PnZ0YHy4jC7v fPdg== X-Gm-Message-State: AOAM531/obqiMchwtMev6aACM3tfuYmLoML4uzyNcrIz12as+ToKOcJz 7zlWS02amdDa2YBNanGXeut67TDbp5JNc3oArr3mEA== X-Google-Smtp-Source: ABdhPJwjkwdTQumV3ZcnY+tG3O9qvBanl2Ug6eQy5n9UaVGEu27TAfaiVxfXBMVLEcd5YQIPTDkS/gMvjrr32ZS4eeE= X-Received: by 2002:a37:4047:: with SMTP id n68mr1634432qka.346.1640174813262; Wed, 22 Dec 2021 04:06:53 -0800 (PST) From: Kashyap Desai References: <20211221123157.14052-1-kashyap.desai@broadcom.com> <7028630054e9cd0e8c84670a27c2b164@mail.gmail.com> In-Reply-To: MIME-Version: 1.0 X-Mailer: Microsoft Outlook 15.0 Thread-Index: AQJC+3Le3mXDqGQStbCqvdqjeo0KCwF7x3T9AYMxWSAB1rDXcQKMG1gtAfxED/6rHW+aIA== Date: Wed, 22 Dec 2021 17:36:51 +0530 Message-ID: Subject: RE: [PATCH RFT] blk-mq: optimize queue tag busy iter for shared_tags To: John Garry , axboe@kernel.dk Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, ming.lei@redhat.com, Sathya Prakash Veerichetty Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000210ada05d3baf572" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000210ada05d3baf572 Content-Type: text/plain; charset="UTF-8" > > On 22/12/2021 11:20, Kashyap Desai wrote: > > Yes, above is the same changes I was looking for. I did very basic > > mistake. > > I applied your above commit while doing megaraid_sas testing. > > While I move to mpi3mr testing, I did not apply your patch set. > > But I did not think that my patch would help mpi3mr since it does not use > host_tagset. Internally we are testing performance check for mpi3mr. We want to make sure performance is not impacted due to shared host_tagset before we apply the feature. > > > We can drop > > request of this RFT since I tested above series and it serve the same > > purpose. > > ok, fine. > > And just to confirm, do you now think that we need to fix any older kernel > with some backport of my changes? I think that we would just need to > consider 5.16 (when it becomes stable), 5.15, and and 5.10 It need full patch set (below) + associated fixes. [1] " blk-mq: Use shared tags for shared sbitmap support" Commit - e155b0c238b20f0a866f4334d292656665836c8a Below commit cannot go to stable without [1]. https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-5.17/block&id=fea9f92f1748083cb82049ed503be30c3d3a9b69 I am not sure if stable requirement fits in this case. I mean large patch-set is OK ? Kashyap > > Thanks, > John --000000000000210ada05d3baf572 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQcAYJKoZIhvcNAQcCoIIQYTCCEF0CAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3HMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS MyBQZXJzb25hbFNpZ24gMiBDQSAyMDIwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA vbCmXCcsbZ/a0fRIQMBxp4gJnnyeneFYpEtNydrZZ+GeKSMdHiDgXD1UnRSIudKo+moQ6YlCOu4t rVWO/EiXfYnK7zeop26ry1RpKtogB7/O115zultAz64ydQYLe+a1e/czkALg3sgTcOOcFZTXk38e aqsXsipoX1vsNurqPtnC27TWsA7pk4uKXscFjkeUE8JZu9BDKaswZygxBOPBQBwrA5+20Wxlk6k1 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