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Re: [patch] mm: sparsemem memory_present() memory corruption fix

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From: Ingo Molnar <mingo@...>
To: Christoph Lameter <clameter@...>
Cc: Linus Torvalds <torvalds@...>, Pekka Enberg <penberg@...>, <linux-kernel@...>, Mel Gorman <mel@...>, Nick Piggin <npiggin@...>, Andrew Morton <akpm@...>, Rafael J. Wysocki <rjw@...>, <Yinghai.Lu@...>, <apw@...>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...>, Joe Perches <joe@...>
Subject: Re: [patch] mm: sparsemem memory_present() memory corruption fix
Date: Tuesday, April 15, 2008 - 8:52 pm

* Christoph Lameter <clameter@sgi.com> wrote:


i guess people saw the "you are not running a PAE kernel" warning and 
went to a PAE kernel which didnt have this issue.

OTOH, quite a few testers consciously use non-PAE kernels on 4GB 
systems, so i'd not be surprised if this solved a few mystery 
regressions we have.

	Ingo
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Messages in current thread:
[bug] mm/slab.c boot crash in -git, "kernel BUG at mm/slab.c..., Ingo Molnar, (Fri Apr 11, 3:41 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Pekka Enberg, (Fri Apr 11, 4:21 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Pekka Enberg, (Fri Apr 11, 4:50 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Ingo Molnar, (Fri Apr 11, 4:54 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Pekka Enberg, (Fri Apr 11, 5:05 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Christoph Lameter, (Fri Apr 11, 3:25 pm)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Ingo Molnar, (Tue Apr 15, 1:49 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Pekka Enberg, (Fri Apr 11, 5:08 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Christoph Lameter, (Fri Apr 11, 3:26 pm)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Pekka Enberg, (Fri Apr 11, 5:11 am)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 2:25 am)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Linus Torvalds, (Tue Apr 15, 12:02 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 12:15 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:23 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Linus Torvalds, (Tue Apr 15, 1:23 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 3:39 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 3:54 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 4:03 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:17 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 4:54 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:58 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 5:08 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Pekka Enberg, (Tue Apr 15, 4:34 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:40 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Linus Torvalds, (Tue Apr 15, 5:06 pm)
[patch] mm: sparsemem memory_present() memory corruption fix, Ingo Molnar, (Tue Apr 15, 8:03 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Wed Apr 16, 11:03 am)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Mel Gorman, (Wed Apr 16, 10:05 am)
Re: [patch] mm: sparsemem memory_present() memory corruption..., KAMEZAWA Hiroyuki, (Tue Apr 15, 9:48 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 8:34 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Linus Torvalds, (Tue Apr 15, 10:45 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 8:40 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 9:14 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Christoph Lameter, (Tue Apr 15, 8:45 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 8:52 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Christoph Lameter, (Tue Apr 15, 8:19 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 8:36 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Yinghai Lu, (Tue Apr 15, 8:33 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 8:18 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Yinghai Lu, (Tue Apr 15, 8:32 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 8:44 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Yinghai Lu, (Tue Apr 15, 8:56 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 9:02 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Yinghai Lu, (Tue Apr 15, 9:17 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Christoph Lameter, (Tue Apr 15, 8:46 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 8:52 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Ingo Molnar, (Tue Apr 15, 9:17 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Yinghai Lu, (Tue Apr 15, 9:30 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Yinghai Lu, (Tue Apr 15, 10:00 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., KAMEZAWA Hiroyuki, (Tue Apr 15, 10:20 pm)
Re: [patch] mm: sparsemem memory_present() memory corruption..., Christoph Lameter, (Tue Apr 15, 8:10 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 5:13 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 5:24 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 5:42 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 5:55 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 6:06 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Yinghai Lu, (Tue Apr 15, 7:18 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 6:13 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 6:27 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 7:22 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 7:27 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 8:04 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 7:32 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 6:32 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:28 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:34 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:42 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 4:50 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:58 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 5:08 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 5:19 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Mike Travis, (Tue Apr 15, 5:27 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 5:21 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 5:23 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 5:24 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 5:28 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 6:07 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Mike Travis, (Tue Apr 15, 5:43 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Christoph Lameter, (Tue Apr 15, 5:33 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Mike Travis, (Tue Apr 15, 5:16 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 3:35 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 3:41 pm)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Pekka Enberg, (Tue Apr 15, 2:41 am)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 3:08 am)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 5:11 am)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Yinghai Lu, (Tue Apr 15, 4:31 am)
Re: [bug] SLUB + mm/slab.c boot crash in -rc9, Ingo Molnar, (Tue Apr 15, 4:46 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Ingo Molnar, (Fri Apr 11, 5:24 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Mel Gorman, (Tue Apr 15, 5:36 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Ingo Molnar, (Tue Apr 15, 6:03 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Christoph Lameter, (Fri Apr 11, 3:28 pm)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Ingo Molnar, (Tue Apr 15, 1:43 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Christoph Lameter, (Sat Apr 12, 6:38 am)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Yinghai Lu, (Sat Apr 12, 1:22 pm)
Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/sl..., Nick Piggin, (Fri Apr 11, 6:34 am)

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