Re: Fw: [BUG][PATCH] fix mempolcy's check on a system withmemory-less-node take3

[KAMEZAWA Hiroyuki]

On Thu, 8 Feb 2007 11:28:30 -0800 (PST)
Christoph Lameter <clameter@xxxxxxx> wrote:
> > @@ -193,9 +197,11 @@
> >  		break;
> >  	case MPOL_BIND:
> >  		policy->v.zonelist = bind_zonelist(nodes);
> > -		if (policy->v.zonelist == NULL) {
> > +		if (IS_ERR(policy->v.zonelist)) {
> > +			void *val = policy->v.zonelist;
> > +			policy->v.zonelist = NULL;
> 
> void *? Ahh. It takes the error code.
> 
> Looks good. But if we are really going down this road of memory-less 
> nodes we may want to audit the kernel for other issues.
> 
> Could you run a series of tests on that machine?
> 
Yes. The program which caused trouble works fine.
I used 'numademo' command in numactl package.
It works fine (reports -EINVAL) with this patch now.

I uses this a system with an empty-node for 5 months.
reported 2 bugs.
- oom-kill's memory less node detection logic.
- mempolicy's NULL access(this)

It works fine in general.
(old RHEL4/linux-2.6.9 kernel doesn't boot on this system.)

-Kame









-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/