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Subject: Re: [PATCH v35 1/5] mm: support to get hints of free page blocks
On 07/12/2018 12:23 AM, Linus Torvalds wrote:
On Wed, Jul 11, 2018 at 2:21 AM Michal Hocko <firstname.lastname@example.org> wrote:We already have an interface for that. alloc_pages(GFP_NOWAIT, MAX_ORDER -1). So why do we need any array based interface?That was actually my original argument in the original thread - that the only new interface people might want is one that just tells how many of those MAX_ORDER-1 pages there are. See the thread in v33 with the subject "[PATCH v33 1/4] mm: add a function to get free page blocks" and look for me suggesting just using #define GFP_MINFLAGS (__GFP_NORETRY | __GFP_NOWARN | __GFP_THISNODE | __GFP_NOMEMALLOC)
Would it be better to remove __GFP_THISNODE? We actually want to get all the guest free pages (from all the nodes).