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    SubjectRe: [RFC] per thread page reservation patch
    On Sat, 8 Jan 2005, Nikita Danilov wrote:
    > Andrew Morton <akpm@osdl.org> writes:
    > >
    > > __alloc_pages(GFP_KERNEL, ...) doesn't return NULL. It'll either succeed
    > > or never return ;) That behaviour may change at any time of course, but it
    >
    > Hmm... it used to, when I wrote that code.

    And still does, if OOM decides to kill _your_ task: OOM sets PF_MEMDIE,
    and then you don't get to go the retry route at all:

    /* This allocation should allow future memory freeing. */
    if ((p->flags & (PF_MEMALLOC | PF_MEMDIE)) && !in_interrupt()) {
    /* go through the zonelist yet again, ignoring mins */
    for (i = 0; (z = zones[i]) != NULL; i++) {
    page = buffered_rmqueue(z, order, gfp_mask);
    if (page)
    goto got_pg;
    }
    goto nopage;
    }
    ....
    nopage:
    ....
    return NULL;

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