linux-kernel - Re: [PATCH 6/6] mce-inject: use injected mce only during faked handler call

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Message-ID: <4ACECC49.7000602@jp.fujitsu.com>
Date:	Fri, 09 Oct 2009 14:38:17 +0900
From:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
To:	Huang Ying <ying.huang@...el.com>
CC:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Andi Kleen <ak@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/6] mce-inject: use injected mce only during faked handler
 call

Huang Ying wrote:
> On Mon, 2009-10-05 at 11:10 +0800, Hidetoshi Seto wrote: 
>> +/*
>> + * For error injection
>> + */
>> +
>> +struct mce_fake_banks {
>> +	int valid;
>> +	struct mce injectm;
>> +};
> 
> There are some bits available in mce.inject_flags. I don't think it is
> necessary to add another variable just for another flag.

I disagreed.  I think it is necessary.

If we try to support injecting multiple event to a cpu, we should have a flag
like this sooner or later.  Or we have to manage injectm[].inject_flags.

And I think the inject_flags should not have bits for kernel internal use.
All bits in inject_flags should be used by tools to tell attributes of data
injected with the flag.

As a sample I made an additional patch set to support injecting multiple event
to a CPU.  These change doesn't break current functionality.
Some improve will be required on mce-inject tool to use this feature.

Check my patches and comment on it.

Thanks,
H.Seto

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