linux-kernel - Re: [PATCH] arch/{mips,sparc,microblaze,powerpc}: Don't enable pagefault/preempt twice

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20200604064336.GC1740285@iweiny-DESK2.sc.intel.com>
Date:   Wed, 3 Jun 2020 23:43:36 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Mike Rapoport <rppt@...nel.org>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
        Helge Deller <deller@....de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        "David S. Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-snps-arc@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org,
        linux-xtensa@...ux-xtensa.org, dri-devel@...ts.freedesktop.org,
        Christian Koenig <christian.koenig@....com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH] arch/{mips,sparc,microblaze,powerpc}: Don't enable
 pagefault/preempt twice

On Thu, Jun 04, 2020 at 09:18:05AM +0300, Mike Rapoport wrote:
> On Wed, Jun 03, 2020 at 04:44:17PM -0700, Guenter Roeck wrote:
> > On 6/3/20 2:14 PM, Ira Weiny wrote:
> > > On Wed, Jun 03, 2020 at 01:57:36PM -0700, Andrew Morton wrote:
> > >> On Thu, 21 May 2020 10:42:50 -0700 Ira Weiny <ira.weiny@...el.com> wrote:
> > >>
> > >>>>>
> > >>>>> Actually it occurs to me that the patch consolidating kmap_prot is odd for
> > >>>>> sparc 32 bit...
> > >>>>>
> > >>>>> Its a long shot but could you try reverting this patch?
> > >>>>>
> > >>>>> 4ea7d2419e3f kmap: consolidate kmap_prot definitions
> > >>>>>
> > >>>>
> > >>>> That is not easy to revert, unfortunately, due to several follow-up patches.
> > >>>
> > >>> I have gotten your sparc tests to run and they all pass...
> > >>>
> > >>> 08:10:34 > ../linux-build-test/rootfs/sparc/run-qemu-sparc.sh 
> > >>> Build reference: v5.7-rc4-17-g852b6f2edc0f
> > >>>
> > >>> Building sparc32:SPARCClassic:nosmp:scsi:hd ... running ......... passed
> > >>> Building sparc32:SPARCbook:nosmp:scsi:cd ... running ......... passed
> > >>> Building sparc32:LX:nosmp:noapc:scsi:hd ... running ......... passed
> > >>> Building sparc32:SS-4:nosmp:initrd ... running ......... passed
> > >>> Building sparc32:SS-5:nosmp:scsi:hd ... running ......... passed
> > >>> Building sparc32:SS-10:nosmp:scsi:cd ... running ......... passed
> > >>> Building sparc32:SS-20:nosmp:scsi:hd ... running ......... passed
> > >>> Building sparc32:SS-600MP:nosmp:scsi:hd ... running ......... passed
> > >>> Building sparc32:Voyager:nosmp:noapc:scsi:hd ... running ......... passed
> > >>> Building sparc32:SS-4:smp:scsi:hd ... running ......... passed
> > >>> Building sparc32:SS-5:smp:scsi:cd ... running ......... passed
> > >>> Building sparc32:SS-10:smp:scsi:hd ... running ......... passed
> > >>> Building sparc32:SS-20:smp:scsi:hd ... running ......... passed
> > >>> Building sparc32:SS-600MP:smp:scsi:hd ... running ......... passed
> > >>> Building sparc32:Voyager:smp:noapc:scsi:hd ... running ......... passed
> > >>>
> > >>> Is there another test I need to run?
> > >>
> > >> This all petered out, but as I understand it, this patchset still might
> > >> have issues on various architectures.
> > >>
> > >> Can folks please provide an update on the testing status?
> > > 
> > > I believe the tests were failing for Guenter due to another patch set...[1]
> > > 
> > > My tests with just this series are working.
> > > 
> > >>From my understanding the other failures were unrelated.[2]
> > > 
> > > 	<quote Mike Rapoport>
> > > 	I've checked the patch above on top of the mmots which already has
> > > 	Ira's patches and it booted fine. I've used sparc32_defconfig to build
> > > 	the kernel and qemu-system-sparc with default machine and CPU.
> > > 	</quote>
> > > 
> > > Mike, am I wrong?  Do you think the kmap() patches are still causing issues?
> 
> sparc32 UP and microblaze work for me with next-20200603, but I didn't
> test other architectures. 
>  
> > For my part, all I can say is that -next is in pretty bad shape right now.
> > The summary of my tests says:
> > 
> > Build results:
> > 	total: 151 pass: 130 fail: 21
> > Qemu test results:
> > 	total: 430 pass: 375 fail: 55
> > 
> > sparc32 smp images in next-20200603 still crash for me with a spinlock
> > recursion.
> 
> I think this is because Will's fixes [1] are not yet in -next.
> 
> > s390 images hang early in boot. Several others (alpha, arm64,
> > various ppc) don't even compile. I can run some more bisects over time,
> > but this is becoming a full-time job :-(.
> > 
> > Guenter
> 
> [1] https://lore.kernel.org/lkml/20200526173302.377-1-will@kernel.org

I abandoned the bisect and tested with this fix.[1]  It passes.  Guenter, on
the original thread we had microblaze and ppc working with my fix.

https://lore.kernel.org/lkml/20200519194215.GA71941@roeck-us.net/

Sounds like the current failures above are from something much newer in the
tree.

Ira

[1]
23:26:24 > /home/iweiny/dev/linux-build-test/rootfs/sparc/run-qemu-sparc.sh 
Build reference: next-20200603-3-gf5afe92a2135

Building sparc32:SPARCClassic:nosmp:scsi:hd ... running ......... passed
Building sparc32:SPARCbook:nosmp:scsi:cd ... running ......... passed
Building sparc32:LX:nosmp:noapc:scsi:hd ... running ......... passed
Building sparc32:SS-4:nosmp:initrd ... running ......... passed
Building sparc32:SS-5:nosmp:scsi:hd ... running ......... passed
Building sparc32:SS-10:nosmp:scsi:cd ... running ......... passed
Building sparc32:SS-20:nosmp:scsi:hd ... running ......... passed
Building sparc32:SS-600MP:nosmp:scsi:hd ... running ......... passed
Building sparc32:Voyager:nosmp:noapc:scsi:hd ... running ......... passed
Building sparc32:SS-4:smp:scsi:hd ... running ......... passed
Building sparc32:SS-5:smp:scsi:cd ... running ......... passed
Building sparc32:SS-10:smp:scsi:hd ... running ......... passed
Building sparc32:SS-20:smp:scsi:hd ... running ......... passed
Building sparc32:SS-600MP:smp:scsi:hd ... running ......... passed
Building sparc32:Voyager:smp:noapc:scsi:hd ... running ......... passed


> -- 
> Sincerely yours,
> Mike.