linux-kernel - Re: CONFIG_DEBUG_SLAB_LEAK omits size-4096 and larger?

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Message-ID: <20080611225431.GD25194@fieldses.org>
Date:	Wed, 11 Jun 2008 18:54:31 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	"Weathers, Norman R." <Norman.R.Weathers@...ocophillips.com>
Cc:	Jeff Layton <jlayton@...chiereds.net>,
	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org
Subject: Re: CONFIG_DEBUG_SLAB_LEAK omits size-4096 and larger?

On Wed, Jun 11, 2008 at 05:46:13PM -0500, Weathers, Norman R. wrote:
> I will try and get it patched and retested, but it may be a day or two
> before I can get back the information due to production jobs now
> running.  Once they finish up, I will get back with the info.

Understood.

> Thanks everyone for looking at this, by the way!

And thanks for your persistence.

--b.

> 
> > 
> > 
> > diff --git a/mm/slab.c b/mm/slab.c
> > index 06236e4..b379e31 100644
> > --- a/mm/slab.c
> > +++ b/mm/slab.c
> > @@ -2202,7 +2202,7 @@ kmem_cache_create (const char *name, 
> > size_t size, size_t align,
> >  	 * above the next power of two: caches with object 
> > sizes just above a
> >  	 * power of two have a significant amount of internal 
> > fragmentation.
> >  	 */
> > -	if (size < 4096 || fls(size - 1) == fls(size-1 + REDZONE_ALIGN +
> > +	if (size < 8192 || fls(size - 1) == fls(size-1 + REDZONE_ALIGN +
> >  						2 * 
> > sizeof(unsigned long long)))
> >  		flags |= SLAB_RED_ZONE | SLAB_STORE_USER;
> >  	if (!(flags & SLAB_DESTROY_BY_RCU))
> > 
> 
> 
> Norman Weathers
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