From: Guenter Roeck <linux@roeck-us.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org, linux-next@vger.kernel.org,
sfr@canb.auug.org.au, mhocko@suse.cz,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: mmotm 2015-01-22-15-04: qemu failures due to 'mm: account pmd page tables to the process'
Date: Fri, 23 Jan 2015 21:52:07 -0800 [thread overview]
Message-ID: <20150124055207.GA8926@roeck-us.net> (raw)
In-Reply-To: <20150123135519.9f1061caf875f41f89298d59@linux-foundation.org>
On Fri, Jan 23, 2015 at 01:55:19PM -0800, Andrew Morton wrote:
> On Fri, 23 Jan 2015 07:07:56 -0800 Guenter Roeck <linux@roeck-us.net> wrote:
>
> > >>
> > >> qemu:microblaze generates warnings to the console.
> > >>
> > >> WARNING: CPU: 0 PID: 32 at mm/mmap.c:2858 exit_mmap+0x184/0x1a4()
> > >>
> > >> with various call stacks. See
> > >> http://server.roeck-us.net:8010/builders/qemu-microblaze-mmotm/builds/15/steps/qemubuildcommand/logs/stdio
> > >> for details.
> > >
> > > Could you try patch below? Completely untested.
> > >
> > >>From b584bb8d493794f67484c0b57c161d61c02599bc Mon Sep 17 00:00:00 2001
> > > From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
> > > Date: Fri, 23 Jan 2015 13:08:26 +0200
> > > Subject: [PATCH] microblaze: define __PAGETABLE_PMD_FOLDED
> > >
> > > Microblaze uses custom implementation of PMD folding, but doesn't define
> > > __PAGETABLE_PMD_FOLDED, which generic code expects to see. Let's fix it.
> > >
> > > Defining __PAGETABLE_PMD_FOLDED will drop out unused __pmd_alloc().
> > > It also fixes problems with recently-introduced pmd accounting.
> > >
> > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> > > Reported-by: Guenter Roeck <linux@roeck-us.net>
> >
> > Tested working.
> >
> > Tested-by: Guenter Roeck <linux@roeck-us.net>
> >
> > Any idea how to fix the sh problem ?
>
> Can you tell us more about it? All I'm seeing is "qemu:sh fails to
> shut down", which isn't very clear.
Turns out that the include file defining __PAGETABLE_PMD_FOLDED
was not always included where used, resulting in a messed up mm_struct.
The patch below fixes the problem for the sh architecture.
No idea if the patch is correct/acceptable for other architectures.
Guenter
---
>From 2a11491a5d0642c924db1d78f2b8f21985459062 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@roeck-us.net>
Date: Fri, 23 Jan 2015 21:44:06 -0800
Subject: [PATCH] mm_types: include asm/pgtable.h
Commit 22310c209483 ("mm: account pmd page tables to the process") starts using
__PAGETABLE_PMD_FOLDED in mm_types.h. This define is usually declared in
pgtable.h, so pgtable.h neeeds to be included.
Fixes runtime error with sh targets.
Fixes: 22310c209483 ("mm: account pmd page tables to the process")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
include/linux/mm_types.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 79cdf6f..65db573 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -13,6 +13,7 @@
#include <linux/uprobes.h>
#include <linux/page-flags-layout.h>
#include <asm/page.h>
+#include <asm/pgtable.h>
#include <asm/mmu.h>
#ifndef AT_VECTOR_SIZE_ARCH
--
2.1.0
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next prev parent reply other threads:[~2015-01-24 5:52 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-22 23:05 mmotm 2015-01-22-15-04 uploaded akpm
2015-01-23 5:04 ` mmotm 2015-01-22-15-04: qemu failures due to 'mm: account pmd page tables to the process' Guenter Roeck
2015-01-23 11:13 ` Kirill A. Shutemov
2015-01-23 15:07 ` Guenter Roeck
2015-01-23 21:55 ` Andrew Morton
2015-01-24 2:44 ` Guenter Roeck
2015-01-24 3:05 ` Guenter Roeck
2015-01-24 5:52 ` Guenter Roeck [this message]
2015-01-26 12:29 ` Kirill A. Shutemov
2015-01-26 14:03 ` Guenter Roeck
2015-01-26 14:17 ` Guenter Roeck
2015-01-27 16:16 ` Kirill A. Shutemov
2015-01-27 16:24 ` Guenter Roeck
2015-01-27 21:24 ` Andrew Morton
2015-01-28 6:16 ` Guenter Roeck
2015-01-23 5:08 ` mmotm 2015-01-22-15-04: qemu failure due to 'mm: memcontrol: remove unnecessary soft limit tree node test' Guenter Roeck
2015-01-23 14:18 ` Johannes Weiner
2015-01-23 15:17 ` Christoph Lameter
2015-01-23 16:02 ` Johannes Weiner
2015-01-23 16:59 ` Guenter Roeck
2015-01-23 17:36 ` Johannes Weiner
2015-01-23 17:38 ` Johannes Weiner
2015-01-24 2:02 ` Guenter Roeck
2015-01-27 17:24 ` Michal Hocko
2015-01-28 15:03 ` Christoph Lameter
2015-01-23 15:46 ` Guenter Roeck
2015-01-23 16:03 ` Johannes Weiner
2015-01-23 20:20 ` Christoph Lameter
2015-01-23 20:33 ` Guenter Roeck
2015-01-23 21:09 ` Christoph Lameter
2015-01-24 7:16 ` Johannes Weiner
2015-01-25 21:36 ` Valdis.Kletnieks
2015-01-26 13:37 ` Johannes Weiner
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