linux-kernel - Re: [PATCH] cpuset : Handling improper memory allocation.

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Message-ID: <489A05EF.7000108@qualcomm.com>
Date:	Wed, 06 Aug 2008 13:13:35 -0700
From:	Max Krasnyansky <maxk@...lcomm.com>
To:	Rakib Mullick <rakib.mullick@...il.com>
CC:	pj@....com, menage@...gle.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpuset : Handling improper memory allocation.

Rakib Mullick wrote:
> This patch makes sure that , if kmalloc fails in
> "rebuild_sched_domains", then we've a place to go. If anything else,
> please let me know.
> 

partition_sched_domains() can deal with attrs==NULL case. So we do not
have to abort domain building.

Max


> Thanks.
> 
> Signed-off-by: Md.Rakib H. Mullick (rakib.mullick@...il.com)
> 
> --- linux-2.6.27-rc2.orig/kernel/cpuset.c	2008-08-06 16:23:26.000000000 +0600
> +++ linux-2.6.27-rc2/kernel/cpuset.c	2008-08-06 23:07:59.504441992 +0600
> @@ -615,7 +615,8 @@ void rebuild_sched_domains(void)
>  		if (dattr) {
>  			*dattr = SD_ATTR_INIT;
>  			update_domain_attr_tree(dattr, &top_cpuset);
> -		}
> +		} else
> +			goto rebuild;
>  		*doms = top_cpuset.cpus_allowed;
>  		goto rebuild;
>  	}
> @@ -685,6 +686,8 @@ restart:
>  	if (!doms)
>  		goto rebuild;
>  	dattr = kmalloc(ndoms * sizeof(struct sched_domain_attr), GFP_KERNEL);
> +	if (!dattr)
> +		goto rebuild;
> 
>  	for (nslot = 0, i = 0; i < csn; i++) {
>  		struct cpuset *a = csa[i];
> --
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