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

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Message-ID: <CALCETrUOTjE-kAftBvKL-oyM8ThQpsOppiJyq+aMFcckSHa42g@mail.gmail.com>
Date:	Thu, 30 Apr 2015 13:41:28 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
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 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.

--Andy
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