linux-kernel - Re: [PATCH 2.6.19-rc2] mm/slab.c: check kmalloc() return value.

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Message-ID: <20061022221034.GE3093@redhat.com>
Date:	Sun, 22 Oct 2006 18:10:34 -0400
From:	Dave Jones <davej@...hat.com>
To:	Josef Sipek <jsipek@....cs.sunysb.edu>
Cc:	Amit Choudhary <amit2030@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2.6.19-rc2] mm/slab.c: check kmalloc() return value.

On Sun, Oct 22, 2006 at 05:16:05PM -0400, Josef Sipek wrote:
 > On Sun, Oct 22, 2006 at 01:37:51PM -0700, Amit Choudhary wrote:
 > > Description: Check the return value of kmalloc() in function setup_cpu_cache(), in file mm/slab.c.
 > > 
 > > Signed-off-by: Amit Choudhary <amit2030@...il.com>
 > > 
 > > diff --git a/mm/slab.c b/mm/slab.c
 > > index 84c631f..613ae61 100644
 > > --- a/mm/slab.c
 > > +++ b/mm/slab.c
 > > @@ -2021,6 +2021,7 @@ static int setup_cpu_cache(struct kmem_c
 > >  	} else {
 > >  		cachep->array[smp_processor_id()] =
 > >  			kmalloc(sizeof(struct arraycache_init), GFP_KERNEL);
 > > +		BUG_ON(!cachep->array[smp_processor_id()]);
 > >  
 > >  		if (g_cpucache_up == PARTIAL_AC) {
 > >  			set_up_list3s(cachep, SIZE_L3);
 > 
 > Any reason to BUG instead of trying to return as gracefully as possible?

If we fail to allocate memory this early in boot, we're hosed anyway.

	Dave

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