linux-kernel - [2.6.25-rc5-mm1][regression] ia64: hackbench doesn't finish >12 hour

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Message-Id: <20080317200924.7B4C.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Mon, 17 Mar 2008 20:18:43 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-ia64@...r.kernel.org,
	Fenghua Yu <fenghua.yu@...el.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Tony Luck <tony.luck@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [2.6.25-rc5-mm1][regression] ia64: hackbench doesn't finish >12 hour

Hi

I tested following.

 % ./hackbench 130 process 500

 (this parameter mean consume all physical memory and 1G swap space)


2.6.25-rc3-mm1: works well
2.6.25-rc5:     works well
2.6.25-rc5-mm1: doesn't finish >12 hour 

my bisect indicate the cause of bug is git-ia64.patch.
and, git-ia64.patch of 2.6.25-rc5-mm1 contain following patches.

    [IA64] cleanup and improve fsys_gettimeofday
    [IA64] Multiple outstanding ptc.g instruction support
    [IA64] VIRT_CPU_ACCOUNTING (accurate cpu time accounting)


unfortunately, I don't know how investigate more ;-)
Please any suggestion.





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