On Thu, Dec 6, 2012 at 9:55 AM, Mel Gorman <mgor...@suse.de> wrote:
>
> Yeah. I was listening to a talk while I was writing it, a bit cranky and
> didn't see why I should suffer alone.
Makes sense.
> Quasimoto strikes again
Is that Quasimodo's Japanese cousin?
> - end_pfn = min(pfn + pageblock_nr_pages, zone_end_pfn);
> +
> + /*
> + * As pfn may not start aligned, pfn+pageblock_nr_page
> + * may cross a MAX_ORDER_NR_PAGES boundary and miss
> + * a pfn_valid check. Ensure isolate_freepages_block()
> + * only scans within a pageblock.
> + */
> + end_pfn = ALIGN(pfn + pageblock_nr_pages, pageblock_nr_pages);
> + end_pfn = min(end_pfn, end_pfn);
Ok, this looks much nicer, except it's obviously buggy. The
min(end_pfn, end_pfn) thing is insane, and I'm sure you meant for that
line to be
+ end_pfn = min(end_pfn, zone_end_pfn);
Henrik, does that - corrected - patch (*instead* of the previous one,
not in addition to) also fix your issue?
Linus
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