From: Mel Gorman <mgorman@techsingularity.net>
To: Reza Arbab <arbab@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Paul Mackerras <paulus@ozlabs.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linuxppc-dev@ozlabs.org
Subject: Re: mm: Initialise per_cpu_nodestats for all online pgdats at boot
Date: Thu, 11 Aug 2016 10:28:08 +0100 [thread overview]
Message-ID: <20160811092808.GD8119@techsingularity.net> (raw)
In-Reply-To: <20160810175940.GA12039@arbab-laptop.austin.ibm.com>
On Wed, Aug 10, 2016 at 12:59:40PM -0500, Reza Arbab wrote:
> On Thu, Aug 04, 2016 at 10:24:04AM +0100, Mel Gorman wrote:
> >[ 1.713998] Unable to handle kernel paging request for data at address 0xff7a10000
> >[ 1.714164] Faulting instruction address: 0xc000000000270cd0
> >[ 1.714304] Oops: Kernel access of bad area, sig: 11 [#1]
> >[ 1.714414] SMP NR_CPUS=2048 NUMA PowerNV
> >[ 1.714530] Modules linked in:
> >[ 1.714647] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.7.0-kvm+ #118
> >[ 1.714786] task: c000000ff0680010 task.stack: c000000ff0704000
> >[ 1.714926] NIP: c000000000270cd0 LR: c000000000270ce8 CTR: 0000000000000000
> >[ 1.715093] REGS: c000000ff0707900 TRAP: 0300 Not tainted (4.7.0-kvm+)
> >[ 1.715232] MSR: 9000000102009033 <SF,HV,VEC,EE,ME,IR,DR,RI,LE,TM[E]> CR: 846b6824 XER: 20000000
> >[ 1.715748] CFAR: c000000000008768 DAR: 0000000ff7a10000 DSISR: 42000000 SOFTE: 1
> >GPR00: c000000000270d08 c000000ff0707b80 c0000000011fb200 0000000000000000
> >GPR04: 0000000000000800 0000000000000000 0000000000000000 0000000000000000
> >GPR08: ffffffffffffffff 0000000000000000 0000000ff7a10000 c00000000122aae0
> >GPR12: c000000000a1e440 c00000000fb80000 c00000000000c188 0000000000000000
> >GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> >GPR20: 0000000000000000 0000000000000000 0000000000000000 c000000000cecad0
> >GPR24: c000000000d035b8 c000000000d6cd18 c000000000d6cd18 c000001fffa86300
> >GPR28: 0000000000000000 c000001fffa96300 c000000001230034 c00000000122eb18
> >[ 1.717484] NIP [c000000000270cd0] refresh_zone_stat_thresholds+0x80/0x240
> >[ 1.717568] LR [c000000000270ce8] refresh_zone_stat_thresholds+0x98/0x240
> >[ 1.717648] Call Trace:
> >[ 1.717687] [c000000ff0707b80] [c000000000270d08] refresh_zone_stat_thresholds+0xb8/0x240 (unreliable)
>
> I've been investigating node hotplug. That path is also going to require
> initialization of per_cpu_nodestats. This worked for me:
>
Fix looks ok. Can you add a proper changelog to it including an example
oops or do you need me to do it?
--
Mel Gorman
SUSE Labs
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next prev parent reply other threads:[~2016-08-11 9:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-04 9:24 mm: Initialise per_cpu_nodestats for all online pgdats at boot Mel Gorman
2016-08-04 15:45 ` Reza Arbab
2016-08-05 3:22 ` Paul Mackerras
2016-08-10 17:59 ` Reza Arbab
2016-08-11 9:28 ` Mel Gorman [this message]
2016-08-11 15:47 ` Reza Arbab
2016-08-11 16:04 ` [PATCH] mm: Initialize per_cpu_nodestats for hotadded pgdats Reza Arbab
2016-08-12 2:07 ` Balbir Singh
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