Messages in this thread | | | Date | Thu, 2 Oct 2014 09:36:11 -0700 | Subject | Re: [PATCH 4/4] mm: numa: Do not mark PTEs pte_numa when splitting huge pages | From | Linus Torvalds <> |
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On Thu, Oct 2, 2014 at 6:29 AM, Mel Gorman <mgorman@suse.de> wrote: > This patch reverts 1ba6e0b50b ("mm: numa: split_huge_page: transfer the > NUMA type from the pmd to the pte"). If a huge page is being split due > a protection change and the tail will be in a PROT_NONE vma then NUMA > hinting PTEs are temporarily created in the protected VMA.
So this is the particular bug I was worried about when tracing through the code.
Should I just apply this as-is? And mark it for stable, since this has been around since 3.8 or so. It would seem to be a very safe change to do, regardless of whether this is actually the issue that Dave and maybe Sasha are seeing.
Sasha, I notice that you weren't on the cc for Mel's patches (probably because you got added later to the other thread), but they were all cc'd to lkml so you should see them there. Or I can forward them separately.
Linus
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