Date: Mon, 17 Mar 2008 20:51:54 +0900
From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: linux-ia64@vger.kernel.org, Fenghua Yu <fenghua.yu@intel.com>,
       Tony Luck <tony.luck@intel.com>
Subject: Re: [2.6.25-rc5-mm1][regression] ia64: hackbench doesn't finish >12 hour
Cc: kosaki.motohiro@jp.fujitsu.com, LKML <linux-kernel@vger.kernel.org>,
       Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>,
       Andrew Morton <akpm@linux-foundation.org>
In-Reply-To: <20080317200924.7B4C.KOSAKI.MOTOHIRO@jp.fujitsu.com>
References: <20080317200924.7B4C.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Message-Id: <20080317204810.7B4F.KOSAKI.MOTOHIRO@jp.fujitsu.com>
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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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