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SubjectRe: [PATCH 26/39] nobootmem: use lmb.default_alloc_limit in alloc_bootmem path
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On Mon, 2010-04-12 at 21:50 -0700, Yinghai wrote:
> On 04/12/2010 09:23 PM, Benjamin Herrenschmidt wrote:
> > On Thu, 2010-04-08 at 23:03 -0700, Yinghai Lu wrote:
> >> Generic version __lmb_find_area() is going from high to low, and for 32bit
> >> active_region for 32bit does include high pages
> >>
> >> need to replace the limit with lmb.default_alloc_limit, aka get_max_mapped()
> >>
> >> with this patch, x86 32bit could use generic version of __lmb_find_area()
> >
> > So you unconditionally add access to some lmb specific data structure to
> > generic code ? That isn't going to work very well on archs that don't
> > use lmb.
>
> the whole function
>
> #ifdef CONFIG_HAVE_LMB
> u64 __init find_memory_core_early(int nid, u64 size, u64 align,
> u64 goal, u64 limit)
> {
> int i;
>
> /* Need to go over early_node_map to find out good range for node */
> for_each_active_range_index_in_nid(i, nid) {
> u64 addr;
> u64 ei_start, ei_last;
>
> ei_last = early_node_map[i].end_pfn;
> ei_last <<= PAGE_SHIFT;
> ei_start = early_node_map[i].start_pfn;
> ei_start <<= PAGE_SHIFT;
> addr = __lmb_find_area(ei_start, ei_last,
> goal, limit, size, align);
>
> if (addr == -1ULL)
> continue;
>
> return addr;
> }
>
> return -1ULL;
> }
> #endif
>
> need to access early_node_map[], so leave the function here.

Hrm... find_memory_core_early() is a broken API anyways. Did you add
that ? Again, you insist on pushing all over the place that crakpot
find/reserve API instead of doing a proper allocation, and it's now
leaking with ifdef's & all into the generic code.

This is just all a pile of shit.

I'm tempted to NACK the whole thing and wait for somebody who can code
to come up with something half decent.

Ben.


> >
> > Also, those things should be local to lmb_* anyways.
>
> if you insist, could move it to lmb.c and use work_with_active_regions() around it.
>
> YH
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