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

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Message-Id: <20080317204810.7B4F.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Mon, 17 Mar 2008 20:51:54 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	linux-ia64@...r.kernel.org, Fenghua Yu <fenghua.yu@...el.com>,
	Tony Luck <tony.luck@...el.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	LKML <linux-kernel@...r.kernel.org>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [2.6.25-rc5-mm1][regression] ia64: hackbench doesn't finish >12 hour

Hi Tony-san,

seto-san teach me method of more investigate.
and I found the root cause is contained by following patch.

   [IA64] Multiple outstanding ptc.g instruction support


Could you please revert that patch from ia64?
I dislike its strong regression.

- kosaki

>     [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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