linux-kernel - Re: [BUG] 2.6.24-rc2-mm1

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Date:	Wed, 2 Jan 2008 22:10:59 +0100
From:	"Torsten Kaiser" <just.for.lkml@...glemail.com>
To:	"Christoph Lameter" <clameter@....com>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Andy Whitcroft" <apw@...dowen.org>,
	"Jan Blunck" <jblunck@...e.de>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>
Subject: Re: [BUG] 2.6.24-rc2-mm1 - kernel bug on nfs v4

On Jan 2, 2008 9:51 PM, Christoph Lameter <clameter@....com> wrote:
> On Wed, 2 Jan 2008, Torsten Kaiser wrote:
>
> > I just tested something with vanilla 2.6.24-rc6 and had the same problem.
> > Should this patch, or something similar be included for 2.6.24?
>
> Such a patch is in Andrew's tree.
>
> 2.6.24-rc6-mm1:
>
> tatic struct kmem_cache_node *early_kmem_cache_node_alloc(gfp_t gfpflags,
>                                                            int node)
> {
>         struct page *page;
>         struct kmem_cache_node *n;
>         unsigned long flags;
> ...
>
>     /*
>
>          * lockdep requires consistent irq usage for each lock
>          * so even though there cannot be a race this early in
>          * the boot sequence, we still disable irqs.
>          */
>         local_irq_save(flags);
>         add_partial(kmalloc_caches, page, 0);
>         local_irq_restore(flags);
>         return n;
> }
>

from 2.6.24-rc6-mm1 patch-series file:
slub-noinline-some-functions-to-avoid-them-being-folded-into-alloc-free.patch
slub-move-kmem_cache_node-determination-into-add_full-and-add_partial.patch
slub-move-kmem_cache_node-determination-into-add_full-and-add_partial-slub-workaround-for-lockdep-confusion.patch
slub-avoid-checking-for-a-valid-object-before-zeroing-on-the-fast-path.patch

It seems it got lumped into some other slub patches, but the bug does
not seem to be introduced by them, as I can see it in mainline
2.6.24-rc6.

Should this patch made a candidate for the merge-before-2.6.24-final-queue?

Torsten
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