linux-kernel - Re: specjbb2005 fails with 2.6.29-rc4

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Message-ID: <alpine.LFD.2.00.0902111733170.3189@localhost.localdomain>
Date:	Wed, 11 Feb 2009 17:35:52 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Lin Ming <ming.m.lin@...el.com>
cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: specjbb2005 fails with 2.6.29-rc4



On Thu, 12 Feb 2009, Lin Ming wrote:
> 
> Test with Jrockit VM fails. And it works well if OpenJDK is used
> instead.

I suspect maybe it uses hugetlbs?

There were a couple of commits to fix VM_ACCOUNT for hugepage areas 
recently. See

 - 5a6fe125950676015f5108fb71b2a67441755003: "Do not account for the 
   address space used by hugetlbfs using VM_ACCOUNT"

 - 17c9d12e126cb0de8d535dc1908c4819d712bc68: "Do not account for hugetlbfs 
   quota at mmap() time if mapping [SHM|MAP]_NORESERVE"

because hugetlb mappings have their own magical VM accounting.

So can you check if current -git fixes it?

		Linus
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