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 ECEDAC433EF for ; Thu, 16 Dec 2021 11:55:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234024AbhLPLzo (ORCPT ); Thu, 16 Dec 2021 06:55:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35134 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233979AbhLPLzn (ORCPT ); Thu, 16 Dec 2021 06:55:43 -0500 Received: from mail-qk1-x734.google.com (mail-qk1-x734.google.com [IPv6:2607:f8b0:4864:20::734]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 87B0CC061574 for ; Thu, 16 Dec 2021 03:55:43 -0800 (PST) Received: by mail-qk1-x734.google.com with SMTP id l25so13720658qkl.5 for ; Thu, 16 Dec 2021 03:55:43 -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=Jf67PJ3Ehz48j/GFdvMMIvLhkt4Y1TfDR6KglDRDsN4=; b=Z1Lag+6jTwrIhIT44beuXd/Q3CFK9olpzgM/aOmlu+M3NJkNQK/HM2/m+aWxc74Von x7MOTF68jzfL7uOt0UdNOaB3/AcZkUP/15loI+zcwtoc2hKl6Xs2UJK/Y8g7H6kQPnUn LuSdEiRbvh59v4peEhwHZhtmgThVALXAKcg5s= 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=Jf67PJ3Ehz48j/GFdvMMIvLhkt4Y1TfDR6KglDRDsN4=; b=HHT4Ft555slJr8IJJuFedy+vKDyVLkIjDf56WFz2v5YogUIjRn5MDJ3n2ivzbPyJcb wON26iAVrirE3gMz572iBojGdgxfObHoScn5VbI25nURC0aBXjfleL7kX6diqYTS+dEE Q0JD7v3K+IDBF1NB95INEFXyoJvVk1bgW50KUsRKkL3PNwh7RvP6NSalJanQOYlgVnUJ c38GmrgCTN/21b34LMX8e7DUfqPB6Y5YiaOXyCwyNyCyJ9px4hDwQQ2zu1Wmx+qcRWZx Ygo26g04oND8rfYAU6XM2laRU88PbyV6Km4m9dHr0+y4X2B8GO1EnZznfG8Vor0zzGfZ Avcw== X-Gm-Message-State: AOAM531YataScA4W8TurC6PgGZvmvodTpyrtO79LOt3Iu0Rr0lZjMHJe 8wyZwPpUooTgh4n0AVXWDZB6nrA3nbjlHN7+ugrMaw== X-Google-Smtp-Source: ABdhPJwA4rhyjxGY7MO/VTHtF8GYgH8uzQjHS09M9Ei25sT6b1dkurABd9+RmwsEqXpJ5IXI2pMlBaYJ6BqftksdZQM= X-Received: by 2002:a37:4047:: with SMTP id n68mr11395251qka.346.1639655742664; Thu, 16 Dec 2021 03:55:42 -0800 (PST) From: Kashyap Desai References: <20210906065003.439019-1-ming.lei@redhat.com> <0d8666c9983158a4954f30f6b429e797@mail.gmail.com> <86f2fb27dd6bc53fec3d8677c078937e@mail.gmail.com> <3065cf1a25a99a2dd89e9065d679410e@mail.gmail.com> In-Reply-To: MIME-Version: 1.0 X-Mailer: Microsoft Outlook 15.0 Thread-Index: AQCw9RdeG8B11ACtJOqN2MhOUMiBIQFcykQ1AY8PSusCS4w5QAGYevsEAYBQr3wCBMUVBa4wVDZQ Date: Thu, 16 Dec 2021 17:25:41 +0530 Message-ID: <7518aac238de9a2c2ec3f857c43dd2e9@mail.gmail.com> Subject: RE: [PATCH] blk-mq: avoid to iterate over stale request To: Ming Lei Cc: luojiaxing , Jens Axboe , linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, "Martin K. Petersen" , John Garry Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000001ca3bd05d3421ac2" Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org --0000000000001ca3bd05d3421ac2 Content-Type: text/plain; charset="UTF-8" > > > > I mean, shared bitmap in my whole discussion. Megaraid_sas driver use > > shared bitmap, so it is exposed and It is confirmed from this discussion. > > Do we still have exposure (if "blk-mq: avoid to iterate over stale > > request" is not part of kernel) to mpi3mr type driver which does not > > use shared bitmap but has nr_hw_queues > 1. ? > > Not sure I understand your poing, but patch "blk-mq: avoid to iterate over > stale request" can cover both shared tags or not. I agree with all above reply. My query is for mpi3mr driver which is not calling "host->host_tagset = 1;", but nr_hw_queues are more than 1. Current driver is nvme style interface. nr_hw_queues > 1 and host->host_tagset = 0. Is this patch "blk-mq: avoid to iterate over stale request" is applicable for driver ? 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