From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-it0-f50.google.com ([209.85.214.50]:55059 "EHLO mail-it0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750954AbeEBKjF (ORCPT ); Wed, 2 May 2018 06:39:05 -0400 Received: by mail-it0-f50.google.com with SMTP id z6-v6so12960804iti.4 for ; Wed, 02 May 2018 03:39:04 -0700 (PDT) From: Kashyap Desai References: <3f49cb1f5a04fd61a73fe9f033868278@mail.gmail.com> <20180502094713.GA31961@ming.t460p> <0efdcd2c4aa241f5d9d6acad915ee4fe@mail.gmail.com> <20180502103403.GB31961@ming.t460p> In-Reply-To: <20180502103403.GB31961@ming.t460p> MIME-Version: 1.0 Date: Wed, 2 May 2018 16:09:02 +0530 Message-ID: <5bb14f3f91dcc1d8ff04de4f01904932@mail.gmail.com> Subject: RE: Performance drop due to "blk-mq-sched: improve sequential I/O performance" To: Ming Lei Cc: linux-scsi@vger.kernel.org, linux-block@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org > > I have created internal code changes based on below RFC and using irq > > poll CPU lockup issue is resolved. > > https://www.spinics.net/lists/linux-scsi/msg116668.html > > Could we use the 1:1 mapping and not apply out-of-tree irq poll in the > following test? So that we can keep at same page easily. Above RFC changes are not used in my testing. I used same inbox driver from 4.17-rc. > > Thanks, > Ming