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Date: Wed, 19 Jun 2019 09:39:48 -0700 From: Yang Shi <yang.shi@...ux.alibaba.com> To: Vlastimil Babka <vbabka@...e.cz>, Michal Hocko <mhocko@...nel.org> Cc: akpm@...ux-foundation.org, mgorman@...hsingularity.net, linux-mm@...ck.org, linux-kernel@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org Subject: Re: [PATCH] mm: mempolicy: handle vma with unmovable pages mapped correctly in mbind On 6/19/19 1:18 AM, Vlastimil Babka wrote: > On 6/18/19 7:06 PM, Yang Shi wrote: >> The BUG_ON was removed by commit >> d44d363f65780f2ac2ec672164555af54896d40d ("mm: don't assume anonymous >> pages have SwapBacked flag") since 4.12. > Perhaps that commit should be sent to stable@ ? Although with > VM_BUG_ON() this is less critical than plain BUG_ON(). I don't think we have to. I agree it is less critical, VM_DEBUG should be not enabled for production environment. And, it doesn't actually break anything since split_huge_page would just return error, and those unmovable pages are silently ignored by isolate.
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