linux-kernel - Re: [PATCH v3 00/14] mm, hugetlb: remove a hugetlb_instantiation

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Date:	Mon, 31 Mar 2014 09:27:43 -0700
From:	Dave Hansen <dave.hansen@...el.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	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>,
	David Gibson <david@...son.dropbear.id.au>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Hillf Danton <dhillf@...il.com>
Subject: Re: [PATCH v3 00/14] mm, hugetlb: remove a hugetlb_instantiation_mutex

On 12/17/2013 10:53 PM, Joonsoo Kim wrote:
> * NOTE for v3
> - Updating patchset is so late because of other works, not issue from
> this patchset.

Hey Joonsoo,

Any plans to repost these?

I've got some folks with a couple TB of RAM seeing long startup times
with $LARGE_DATABASE_PRODUCT.  It looks to be contention on
hugetlb_instantiation_mutex because everyone is trying to zero hugepages
under that lock in parallel.  Just removing the lock sped things up
quite a bit.
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