From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
"linux-next@vger.kernel.org" <linux-next@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mikael Starvik <starvik@axis.com>,
Jesper Nilsson <jespern@axis.com>,
Minchan Kim <minchan@kernel.org>,
linux-cris-kernel@axis.com
Subject: Re: crisv32 runtime failure in -next due to 'page-flags: define behavior SL*B-related flags on compound pages'
Date: Mon, 21 Sep 2015 18:34:35 +0300 (EEST) [thread overview]
Message-ID: <20150921153435.CE98C138@black.fi.intel.com> (raw)
In-Reply-To: <55FC2A1F.8050207@roeck-us.net>
Guenter Roeck wrote:
> On 09/18/2015 07:53 AM, Jesper Nilsson wrote:
> > On Fri, Sep 18, 2015 at 05:25:07PM +0300, Kirill A. Shutemov wrote:
> >> On Thu, Sep 17, 2015 at 09:29:27AM -0700, Guenter Roeck wrote:
> >>> Hi,
> >>>
> >>> my crisv32 qemu test fails with next-20150917 as follows.
> >>>
> >>> NET: Registered protocol family 16
> >>> kernel BUG at mm/slab.c:1648!
> >>> Linux 4.3.0-rc1-next-20150917 #1 Wed Sep 16 23:56:59 PDT 2015
> >>> Oops: 0000
> >>>
> >>> [ register dump follows ]
> >>>
> >>> See http://server.roeck-us.net:8010/builders/qemu-crisv32-next/builds/83/steps/qemubuildcommand/logs/stdio
> >>> for a complete log.
> >>
> >> Is there a chance to get proper backtrace?
> >
> > Yes, it should be possible with CONFIG_KALLSYMS=y in the kconfig.
> >
>
> Good to know. I added it to my configuration.
>
> Here it is:
>
> kernel BUG at mm/slab.c:1648!
I still don't understand what's going on :(
Could you try with this instrumentation:
diff --git a/mm/slab.c b/mm/slab.c
index ce9c6531e6f7..10035d1a06d3 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1645,7 +1645,11 @@ static void kmem_freepages(struct kmem_cache *cachep, struct page *page)
sub_zone_page_state(page_zone(page),
NR_SLAB_UNRECLAIMABLE, nr_freed);
- BUG_ON(!PageSlab(page));
+ if (!PageSlab(page)) {
+ dump_page(page, "page");
+ dump_page(compound_head(page), "compound_head(page)");
+ BUG();
+ }
__ClearPageSlabPfmemalloc(page);
__ClearPageSlab(page);
page_mapcount_reset(page);
--
Kirill A. Shutemov
next prev parent reply other threads:[~2015-09-21 15:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-17 16:29 crisv32 runtime failure in -next due to 'page-flags: define behavior SL*B-related flags on compound pages' Guenter Roeck
2015-09-18 14:25 ` Kirill A. Shutemov
2015-09-18 14:53 ` Jesper Nilsson
2015-09-18 15:13 ` Guenter Roeck
2015-09-21 15:34 ` Kirill A. Shutemov [this message]
2015-09-22 1:17 ` Guenter Roeck
2015-09-22 12:03 ` Kirill A. Shutemov
2015-09-22 12:19 ` Mikael Starvik
2015-09-22 12:50 ` Hans-Peter Nilsson
2015-09-22 13:27 ` Kirill A. Shutemov
2015-09-22 13:57 ` Hans-Peter Nilsson
2015-09-22 15:18 ` Paul E. McKenney
2015-09-22 15:31 ` Kirill A. Shutemov
2015-09-22 15:40 ` Paul E. McKenney
2015-09-23 10:53 ` Kirill A. Shutemov
2015-09-23 15:02 ` Guenter Roeck
2015-09-24 4:45 ` Paul E. McKenney
2015-09-22 16:16 ` Hans-Peter Nilsson
2015-09-22 16:39 ` Paul E. McKenney
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