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 X-Spam-Level: X-Spam-Status: No, score=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0D17C10F27 for ; Tue, 10 Mar 2020 18:32:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A7B6320727 for ; Tue, 10 Mar 2020 18:32:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ed6zJKUM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727420AbgCJScx (ORCPT ); Tue, 10 Mar 2020 14:32:53 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:33126 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727071AbgCJScx (ORCPT ); Tue, 10 Mar 2020 14:32:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=BM1rOj2mhNiPAl7HQ9Dqr15pnyhMXu6TgEmfxY4G2dE=; b=ed6zJKUMN0NHTWgGMZZSTBEMDJ ZDwYVpOOtBbWFiUHnmoG6GaShnCVBNtgLFdocdwwRDKj4qutRI2XnmiCFY3FvYu0H6LTim5ZMYG7l er2Lg68TxUnu7dgmzliLVYHYuWZlDRVJZnXxTrNbeyTmFNxMT/4eKfoklcs5lYKYFagBDGM3D1DXQ Mfob/seec8sdaZisq4mZffAyZUetOdUKq7p7SqhAx2aZ6sX/rk12t8fIAlAmkmzXB/Fu5MVzj1oNr 3IDqAJiLb2d029n6cYMi7pHsO0hMT85id6WaFxFPrLWgXPuuRoplFfqkZd8EvysaP2+Sgd06AOwkD QGZb4vxQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jBjgJ-0005Yb-SK; Tue, 10 Mar 2020 18:32:43 +0000 Date: Tue, 10 Mar 2020 11:32:43 -0700 From: Christoph Hellwig To: John Garry Cc: axboe@kernel.dk, jejb@linux.ibm.com, martin.petersen@oracle.com, hare@suse.de, ming.lei@redhat.com, bvanassche@acm.org, hch@infradead.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, virtualization@lists.linux-foundation.org, esc.storagedev@microsemi.com, chenxiang66@hisilicon.com, Hannes Reinecke Subject: Re: [PATCH RFC v2 02/24] scsi: allocate separate queue for reserved commands Message-ID: <20200310183243.GA14549@infradead.org> References: <1583857550-12049-1-git-send-email-john.garry@huawei.com> <1583857550-12049-3-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1583857550-12049-3-git-send-email-john.garry@huawei.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 11, 2020 at 12:25:28AM +0800, John Garry wrote: > From: Hannes Reinecke > > Allocate a separate 'reserved_cmd_q' for sending reserved commands. Why? Reserved command specifically are not in any way tied to queues.