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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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139b830477
While pursuing and unrelated issue with 64Mb granules I noticed a problem related to inconsistent use of add_active_range. There doesn't appear any reason to me why FLATMEM versus DISCONTIG_MEM should register memory to add_active_range with different code. So I've changed the code into a common implementation. The other subtle issue fixed by this patch was calling add_active_range in count_node_pages before granule aligning is performed. We were lucky with 16MB granules but not so with 64MB granules. count_node_pages has reserved regions filtered out and as a consequence linked kernel text and data aren't covered by calls to count_node_pages. So linked kernel regions wasn't reported to add_active_regions. This resulted in free_initmem causing numerous bad_page reports. This won't occur with this patch because now all known memory regions are reported by register_active_ranges. Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Bob Picco <bob.picco@hp.com> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Tony Luck <tony.luck@intel.com> |
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