linux-kernel - Re: [PATCH EDACv2 01/12] edac: add support for raw error reports

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Date:	Thu, 21 Feb 2013 13:01:25 -0300
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Linux Edac Mailing List <linux-edac@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH EDACv2 01/12] edac: add support for raw error reports

Em Thu, 21 Feb 2013 16:53:37 +0100
Borislav Petkov <bp@...en8.de> escreveu:

> On Thu, Feb 21, 2013 at 12:38:59PM -0300, Mauro Carvalho Chehab wrote:
> > That allows APEI GHES driver to report errors directly, using
> > the EDAC error report API.
> > 
> > Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
> > ---
> >  drivers/edac/edac_core.h |  17 ++++++++
> >  drivers/edac/edac_mc.c   | 109 ++++++++++++++++++++++++++++++++++++-----------
> >  2 files changed, 100 insertions(+), 26 deletions(-)
> > 
> > diff --git a/drivers/edac/edac_core.h b/drivers/edac/edac_core.h
> > index 23bb99f..9c5da11 100644
> > --- a/drivers/edac/edac_core.h
> > +++ b/drivers/edac/edac_core.h
> > @@ -453,6 +453,23 @@ extern struct mem_ctl_info *find_mci_by_dev(struct device *dev);
> >  extern struct mem_ctl_info *edac_mc_del_mc(struct device *dev);
> >  extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
> >  				      unsigned long page);
> > +
> > +void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
> > +			  struct mem_ctl_info *mci,
> > +			  long grain,
> > +			  const u16 error_count,
> > +			  const int top_layer,
> > +			  const int mid_layer,
> > +			  const int low_layer,
> > +			  const unsigned long page_frame_number,
> > +			  const unsigned long offset_in_page,
> > +			  const unsigned long syndrome,
> > +			  const char *msg,
> > +			  const char *location,
> > +			  const char *label,
> > +			  const char *other_detail,
> > +			  const bool enable_per_layer_report);
> 
> Why not merge this patch with 10/12?
> 
> You're adding edac_raw_mc_handle_error here and rewriting it in 10/12.
> This looks like unnecessary churn to me.

I did this way to to follow the "one patch per logical change rule".
The rationale for this patch is to allow doing raw error reports,
as needed by changeset 06/12.

The rationale for 10/12 was to reduce the stack pressure. While
10/12 touches on the above routine, it's main focus is to fix a
previous fixup of using a large space inside the stack during the
memory report preparation.

Regards,
Mauro
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