Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754444Ab3HPQkP (ORCPT ); Fri, 16 Aug 2013 12:40:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34103 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752409Ab3HPQkL (ORCPT ); Fri, 16 Aug 2013 12:40:11 -0400 Date: Fri, 16 Aug 2013 18:41:57 +0200 From: Alexander Gordeev To: "Nicholas A. Bellinger" Cc: Mike Christie , James Bottomley , Jens Axboe , Tejun Heo , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, Jeff Garzik , linux-scsi Subject: Re: [PATCH RESEND 0/1] AHCI: Optimize interrupt processing Message-ID: <20130816164156.GA14582@dhcp-26-207.brq.redhat.com> References: <1374195825.7397.997.camel@haakon3.risingtidesystems.com> <1374215660.7397.1041.camel@haakon3.risingtidesystems.com> <1374248000.2266.20.camel@dabdike> <1374267684.7397.1058.camel@haakon3.risingtidesystems.com> <1374296162.7397.1098.camel@haakon3.risingtidesystems.com> <51EAA33C.9010405@fusionio.com> <20130809191542.GD25306@dhcp-26-207.brq.redhat.com> <1376079457.5171.172.camel@haakon3.risingtidesystems.com> <20130815162316.GA27882@dhcp-26-207.brq.redhat.com> <1376619569.5171.217.camel@haakon3.risingtidesystems.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1376619569.5171.217.camel@haakon3.risingtidesystems.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 937 Lines: 22 On Thu, Aug 15, 2013 at 07:19:29PM -0700, Nicholas A. Bellinger wrote: > I'm playing with a patch to do this, but am currently getting hung-up on > what appear to be some separate blk-mq reserved_tags > 0 bugs, the first > of which is passing queue_depth=1 + reserved_tags=1 is broken, and > results in tags->nr_free = 0. That is not a bug - please look at Jens replies in this thread some week ago. In short, queue_depth=1 means 1 tags in total and reserved_tags=1 results in zero normal tags. You need to request the depth=2 and reserved_tags=1. But yes, this is a separate topic and I am looking forward to hear from Jens wrt flushes. -- Regards, Alexander Gordeev agordeev@redhat.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/