linux-kernel - Re: [PATCH 2/4] x86/mce/amd: Introduce deferred error interrupt handler

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Date:	Thu, 30 Apr 2015 23:16:30 -0500
From:	Aravind Gopalakrishnan <aravind.gopalakrishnan@....com>
To:	Andy Lutomirski <luto@...capital.net>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Tony Luck <tony.luck@...el.com>,
	"Borislav Petkov" <bp@...en8.de>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Yinghai Lu <yinghai@...nel.org>, X86 ML <x86@...nel.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Jan Beulich <JBeulich@...e.com>, <slaoub@...il.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Prarit Bhargava <prarit@...hat.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>, <jroedel@...e.de>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Wang Nan <wangnan0@...wei.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-edac <linux-edac@...r.kernel.org>
Subject: Re: [PATCH 2/4] x86/mce/amd: Introduce deferred error interrupt handler


On 4/30/15 3:41 PM, Andy Lutomirski wrote:
> On Thu, Apr 30, 2015 at 7:49 AM, Aravind Gopalakrishnan
> <Aravind.Gopalakrishnan@....com> wrote:
>> Changes introduced in the patch-
>>    - Assign vector number 0xf4 for Deferred errors
>>    - Declare deferred_interrupt, allocate gate and bind it
>>      to DEFERRED_APIC_VECTOR.
>>    - Declare smp_deferred_interrupt to be used as the
>>      entry point for the interrupt in mce_amd.c
>>    - Define trace_deferred_interrupt for tracing
>>    - Enable deferred error interrupt selectively upon detection
>>      of 'succor' bitfield
>>    - Setup amd_deferred_error_interrupt() to handle the interrupt
>>      and assign it to def_int_vector if feature is present in HW.
>>      Else, let default handler deal with it.
>>    - Provide Deferred error interrupt stats on
>>      /proc/interrupts by incrementing irq_deferred_count
> You're calling these "deferred interrupts" all over (e.g.
> irq_deferred_count, deferred_int_handler, etc).  That seems like it'll
> be confusing.  They're deferred errors, not deferred interrupts.
>

I used  the term as it is an interrupt due to the deferred error.
Would 'deferred_err_interrupt' be more apt? Maybe 
'irq_deferred_error_count' for the counter?

Thanks,
-Aravind.
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