linux-kernel - Re: [PATCH next/mmotm] slub: partly fix freeze in __slab

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Message-ID: <alpine.DEB.2.00.1107121010060.1672@router.home>
Date:	Tue, 12 Jul 2011 10:11:52 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Pekka Enberg <penberg@...nel.org>
cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Hugh Dickins <hughd@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH next/mmotm] slub: partly fix freeze in __slab_free

On Tue, 12 Jul 2011, Pekka Enberg wrote:

> > diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
> > index 3d76a43..1351d28 100644
> > --- a/include/linux/mm_types.h
> > +++ b/include/linux/mm_types.h
> > @@ -62,7 +62,7 @@ struct page {
> >   		struct {			/* SLUB cmpxchg_double area */
> >   			void *freelist;
> >   			union {
> > -				unsigned long counters;
> > +				u64	counters;
> >   				struct {
> >   					unsigned inuse:16;
> >   					unsigned objects:15;
> >
>
> Christoph?


counters needs to overlay the bitfields as well as _count. That is problem
with the earlier fix.

Sorry I have had a power outage for the last two days (strange Chicago
weather) and my server is only up for a few minutes and will go down
periodically due to a UPS malfunction. On a generator. Sigh.


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