Message-ID: <4AC1C889.705@jp.fujitsu.com>
Date: Tue, 29 Sep 2009 17:42:49 +0900
From: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
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To: Andi Kleen <ak@linux.intel.com>
CC: Huang Ying <ying.huang@intel.com>, Ingo Molnar <mingo@elte.hu>,
       "H. Peter Anvin" <hpa@zytor.com>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/5] mce-inject: make injected mce valid only during faked
 handler call
References: <1254100882.15717.1312.camel@yhuang-dev.sh.intel.com> <4AC05BBF.3010102@jp.fujitsu.com> <4AC05D48.1000007@jp.fujitsu.com> <4AC10588.90808@linux.intel.com>
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Andi Kleen wrote:
>> This has an undesired side-effect: it is possible for it to be
>> consumed by real machine_check_poll. This may confuse a real system
>> error and may confuse the mce test suite.
> 
> You can just disable the poll handler in the test suite. That's
> what we did.

I'd like to fix this simply, rather than providing documentation like
"you should turn off polling before you use the mce-inject."

>> The injectm.valid becomes "2" only during faked MCE handler call
>> and protected by IRQ disabling. This make it impossible for real
>> machine_check_poll to consume it.
> 
> Using magic numbers for this seems very hackish.

Right.  I'll take other approach in next time.


Thanks,
H.Seto

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