linux-kernel - Re: [PATCH 17/18] mm, hugetlb: retry if we fail to allocate a hugepage with use

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Date:	Fri, 9 Aug 2013 18:37:24 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	David Gibson <david@...son.dropbear.id.au>
Cc:	Davidlohr Bueso <davidlohr@...com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Michal Hocko <mhocko@...e.cz>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Hugh Dickins <hughd@...gle.com>,
	Davidlohr Bueso <davidlohr.bueso@...com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Hillf Danton <dhillf@...il.com>
Subject: Re: [PATCH 17/18] mm, hugetlb: retry if we fail to allocate a
 hugepage with use_reserve

> I once attempted an approach involving an atomic counter of the number
> of "in flight" hugepages, only retrying when it's non zero.  Working
> out a safe ordering for all the updates to get all the cases right
> made my brain melt though, and I never got it working.

I sent v2 few seconds before. My new approach is similar as yours.
Could you review my patches to save my brain to be melted? :)

Thanks.

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