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SubjectRe: upcoming kerneloops.org item: get_page_from_freelist
On Wed, 24 Jun 2009 12:16:20 -0700 (PDT)
Linus Torvalds <torvalds@linux-foundation.org> wrote:

> Lookie here. This is 2.6.0:mm/page_alloc.c:
>
> do_retry = 0;
> if (!(gfp_mask & __GFP_NORETRY)) {
> if ((order <= 3) || (gfp_mask & __GFP_REPEAT))
> do_retry = 1;
> if (gfp_mask & __GFP_NOFAIL)
> do_retry = 1;
> }
> if (do_retry) {
> blk_congestion_wait(WRITE, HZ/50);
> goto rebalance;
> }

rebalance:
if ((p->flags & (PF_MEMALLOC | PF_MEMDIE)) && !in_interrupt()) {
/* go through the zonelist yet again, ignoring mins */
for (i = 0; zones[i] != NULL; i++) {
struct zone *z = zones[i];

page = buffered_rmqueue(z, order, cold);
if (page)
goto got_pg;
}
goto nopage;
}



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