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SubjectRe: [PATCH] mm: make reserve_bootmem can crossed the nodes
On Thu, 13 Mar 2008 18:35:51 -0700
"Yinghai Lu" <yhlu.kernel@gmail.com> wrote:

> On Thu, Mar 13, 2008 at 6:34 PM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> > On Thu, 13 Mar 2008 16:45:42 -0700
> > "Yinghai Lu" <yhlu.kernel@gmail.com> wrote:
> > > int __init reserve_bootmem(unsigned long addr, unsigned long size,
> > > int flags)
> > > {
> > > - return reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size, flags);
> > > + int ret;
> > > + bootmem_data_t *bdata;
> > > + list_for_each_entry(bdata, &bdata_list, list) {
> > > + ret = can_reserve_bootmem_core(bdata, addr, size, flags);
> > > + if (ret < 0)
> > > + return ret;
> > > + }
> > > + list_for_each_entry(bdata, &bdata_list, list)
> > > + reserve_bootmem_core(bdata, addr, size, flags);
> > > + return 0;
> > > }
> >
> > why list_for_each twice ?
>
> first_for_each only check if we can reserve that.
> second will do the reserve job.
>
Hmm, can a call to reserve_bootmem() return a memory region which spread across
prural nodes ?


Thanks,
-Kame



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