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Date: Mon, 02 Mar 2015 17:30:25 -0800 From: Mike Kravetz <mike.kravetz@...cle.com> To: Andrew Morton <akpm@...ux-foundation.org> CC: linux-mm@...ck.org, linux-kernel@...r.kernel.org, Nadia Yvette Chambers <nyc@...omorphy.com>, Aneesh Kumar <aneesh.kumar@...ux.vnet.ibm.com>, Joonsoo Kim <iamjoonsoo.kim@....com> Subject: Re: [RFC 2/3] hugetlbfs: coordinate global and subpool reserve accounting On 03/02/2015 03:10 PM, Andrew Morton wrote: > On Fri, 27 Feb 2015 14:58:11 -0800 Mike Kravetz <mike.kravetz@...cle.com> wrote: > >> If the pages for a subpool are reserved, then the reservations have >> already been accounted for in the global pool. Therefore, when >> requesting a new reservation (such as for a mapping) for the subpool >> do not count again in global pool. However, when actually allocating >> a page for the subpool decrement global reserve count to correspond to >> with decrement in global free pages. > > The last sentence made my brain hurt. > Sorry. I was trying to point out that the global free and reserve accounting is still the same when doing a page allocation, even though the entire size of the subpool was reserved. For example, when allocating a page the global free and reserve counts are both decremented. -- Mike Kravetz -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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