Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752285AbaGJTPq (ORCPT ); Thu, 10 Jul 2014 15:15:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:30087 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751553AbaGJTPo (ORCPT ); Thu, 10 Jul 2014 15:15:44 -0400 From: Jeff Moyer To: "Elliott\, Robert \(Server Storage\)" Cc: Christoph Hellwig , Jens Axboe , "dgilbert\@interlog.com" , James Bottomley , Bart Van Assche , Benjamin LaHaise , "linux-scsi\@vger.kernel.org" , "linux-kernel\@vger.kernel.org" Subject: Re: scsi-mq V2 References: <1403715121-1201-1-git-send-email-hch@lst.de> <20140708144829.GA5539@infradead.org> <53BD7041.5010300@interlog.com> <53BD9A24.7010203@kernel.dk> <94D0CD8314A33A4D9D801C0FE68B402958B9628B@G9W0745.americas.hpqcorp.net> <20140710062040.GB20146@infradead.org> <94D0CD8314A33A4D9D801C0FE68B402958B96E3B@G9W0745.americas.hpqcorp.net> <20140710160422.GA13728@infradead.org> <20140710161438.GA30792@infradead.org> <94D0CD8314A33A4D9D801C0FE68B402958B971BB@G9W0745.americas.hpqcorp.net> X-PGP-KeyID: 1F78E1B4 X-PGP-CertKey: F6FE 280D 8293 F72C 65FD 5A58 1FF8 A7CA 1F78 E1B4 X-PCLoadLetter: What the f**k does that mean? Date: Thu, 10 Jul 2014 15:14:29 -0400 In-Reply-To: <94D0CD8314A33A4D9D801C0FE68B402958B971BB@G9W0745.americas.hpqcorp.net> (Robert Elliott's message of "Thu, 10 Jul 2014 18:49:55 +0000") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Elliott, Robert (Server Storage)" writes: >> -----Original Message----- >> From: Christoph Hellwig [mailto:hch@infradead.org] >> Sent: Thursday, 10 July, 2014 11:15 AM >> To: Elliott, Robert (Server Storage) >> Cc: Jens Axboe; dgilbert@interlog.com; James Bottomley; Bart Van Assche; >> Benjamin LaHaise; linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org >> Subject: Re: scsi-mq V2 >> >> On Thu, Jul 10, 2014 at 09:04:22AM -0700, Christoph Hellwig wrote: >> > It's starting to look weird. I'll prepare another two bisect branches >> > around some MM changes, which seems the only other possible candidate. >> >> I've pushed out scsi-mq.3-bisect-3 > > Good. > >> and scsi-mq.3-bisect-4 for you. > > Bad. > > Note: I had to apply the vdso2c.h patch to build this -rc3 based kernel: > diff --git a/arch/x86/vdso/vdso2c.h b/arch/x86/vdso/vdso2c.h > index df95a2f..11b65d4 100644 > --- a/arch/x86/vdso/vdso2c.h > +++ b/arch/x86/vdso/vdso2c.h > @@ -93,6 +93,9 @@ static void BITSFUNC(copy_section)(struct BITSFUNC(fake_sections) *out, > uint64_t flags = GET_LE(&in->sh_flags); > > bool copy = flags & SHF_ALLOC && > + (GET_LE(&in->sh_size) || > + (GET_LE(&in->sh_type) != SHT_RELA && > + GET_LE(&in->sh_type) != SHT_REL)) && > strcmp(name, ".altinstructions") && > strcmp(name, ".altinstr_replacement"); > > Results: fio started OK, getting 900K IOPS, but ^C led to 0 IOPS and > an fio hang, with one CPU (CPU 0) stuck in io_submit loops. Hi, Rob, Can you get sysrq-t output for me? I don't know how/why we'd continue to get io_submits for an exiting process. Thanks, Jeff -- 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/