From: Arjan van de Ven <arjanv@redhat.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Marcelo Tosatti <marcelo.tosatti@cyclades.com>,
manfred@colorfullife.com, clameter@engr.sgi.com,
linux-mm@kvack.org, dgc@sgi.com, dipankar@in.ibm.com,
mbligh@mbligh.org
Subject: Re: [PATCH] per-page SLAB freeing (only dcache for now)
Date: Sat, 22 Oct 2005 11:21:13 +0200 [thread overview]
Message-ID: <20051022092113.GA25265@devserv.devel.redhat.com> (raw)
In-Reply-To: <20051021233111.58706a2e.akpm@osdl.org>
On Fri, Oct 21, 2005 at 11:31:11PM -0700, Andrew Morton wrote:
> Marcelo Tosatti <marcelo.tosatti@cyclades.com> wrote:
> >
> > ...
> > +unsigned long long slab_free_status(kmem_cache_t *cachep, struct slab *slabp)
> > +{
> > + unsigned long long bitmap = 0;
> > + int i;
> > +
> > + if (cachep->num > sizeof(unsigned long long)*8)
> > + BUG();
> > +
> > + spin_lock_irq(&cachep->spinlock);
> > + for(i=0; i < cachep->num ; i++) {
> > + if (slab_bufctl(slabp)[i] == BUFCTL_INUSE)
> > + set_bit(i, (unsigned long *)&bitmap);
> > + }
> > + spin_unlock_irq(&cachep->spinlock);
> > +
> > + return bitmap;
> > +}
>
> What if there are more than 64 objects per page?
the bitops usually work on bigger than wordsize things though..
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next prev parent reply other threads:[~2005-10-22 9:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-30 19:37 Marcelo
2005-10-01 2:46 ` Christoph Lameter
2005-10-01 21:52 ` Marcelo
2005-10-03 15:24 ` Christoph Lameter
2005-10-03 20:37 ` Manfred Spraul
2005-10-03 22:17 ` Marcelo Tosatti
2005-10-04 17:04 ` Manfred Spraul
2005-10-06 16:01 ` Marcelo Tosatti
2005-10-22 1:30 ` Marcelo Tosatti
2005-10-22 6:31 ` Andrew Morton
2005-10-22 9:21 ` Arjan van de Ven [this message]
2005-10-22 17:08 ` Christoph Lameter
2005-10-22 17:13 ` ia64 page size (was Re: [PATCH] per-page SLAB freeing (only dcache for now)) Arjan van de Ven
2005-10-22 18:16 ` [PATCH] per-page SLAB freeing (only dcache for now) Manfred Spraul
2005-10-23 18:41 ` Marcelo Tosatti
2005-10-23 16:30 ` Marcelo Tosatti
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