Re: [PATCH v2] bootmem: avoid freeing to bootmem after bootmem is done

[Mel Gorman]

On Mon, Jul 27, 2015 at 11:36:06AM -0400, Chris Metcalf wrote:
> Bootmem isn't popular any more, but some architectures still use it,
> and freeing to bootmem after calling free_all_bootmem_core() can end
> up scribbling over random memory.  Instead, make sure the kernel
> generates a warning in this case by ensuring the node_bootmem_map
> field is non-NULL when are freeing or marking bootmem.
> 
> An instance of this bug was just fixed in the tile architecture
> ("tile: use free_bootmem_late() for initrd") and catching this case
> more widely seems like a good thing.
> 
> Signed-off-by: Chris Metcalf <cmetcalf@xxxxxxxxxx>

Acked-by: Mel Gorman <mgorman@xxxxxxx>

-- 
Mel Gorman
SUSE Labs
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