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From: Robert Richter <rrichter@marvell.com>
To: James Morse <james.morse@arm.com>
Cc: Borislav Petkov <bp@alien8.de>, Tony Luck <tony.luck@intel.com>,
	"Mauro Carvalho Chehab" <mchehab@kernel.org>,
	"linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 10/21] EDAC, ghes: Remove pvt->detail_location string
Date: Wed, 12 Jun 2019 18:13:16 +0000
Message-ID: <20190612181309.l36jlynvqe7xaqmi@rric.localdomain> (raw)
In-Reply-To: <7017c91e-8923-c8d2-26ca-875328ab855a@arm.com>

On 29.05.19 16:13:20, James Morse wrote:
> Hi Robert,
> 
> On 29/05/2019 09:44, Robert Richter wrote:
> > The detail_location[] string in struct ghes_edac_pvt is complete
> > useless and data is just copied around. Put everything into
> > e->other_detail from the beginning.
> 
> We still print all that complete-useless detail_location stuff... so this commit message
> had me confused about what you're doing here. I think you meant the space for the string,
> instead of the value!

No, this patch does not remove the driver details nor it changes the
data representation. It changes how that data is prepared internally.
The patch removes the (useless) intermediate buffer detail_location[]
and writes everything directly into other_detail[] buffer.

> 
> | detail_location[] is used to collect two location strings so they can be passed as one
> | to trace_mc_event(). Instead of having an extra copy step, assemble the location string
> | in other_detail[] from the beginning.
> 
> 
> > diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
> > index 39702bac5eaf..c18f16bc9e4d 100644
> > --- a/drivers/edac/ghes_edac.c
> > +++ b/drivers/edac/ghes_edac.c
> > @@ -23,8 +23,7 @@ struct ghes_edac_pvt {
> >  	struct mem_ctl_info *mci;
> >  
> >  	/* Buffers for the error handling routine */
> > -	char detail_location[240];
> > -	char other_detail[160];
> > +	char other_detail[400];
> >  	char msg[80];
> >  };
> >  
> > @@ -225,13 +224,14 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
> >  	memset(e, 0, sizeof (*e));
> >  	e->error_count = 1;
> >  	strcpy(e->label, "unknown label");
> > -	e->msg = pvt->msg;
> > -	e->other_detail = pvt->other_detail;
> >  	e->top_layer = -1;
> >  	e->mid_layer = -1;
> >  	e->low_layer = -1;
> > -	*pvt->other_detail = '\0';
> > +	e->msg = pvt->msg;
> > +	e->other_detail = pvt->other_detail;
> > +
> >  	*pvt->msg = '\0';
> > +	*pvt->other_detail = '\0';
> 
> ... so no change? Could you drop this hunk?

No actual change here, but I found it useful to reorder things here
for comparization with the similar code block in
edac_mc_handle_error().


> 
> Regardless,
> Reviewed-by: James Morse <james.morse@arm.com>

Thank you for review.

-Robert

> 
> 
> Thanks,
> 
> James

  reply index

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-29  8:44 [PATCH 00/21] EDAC, mc, ghes: Fixes and updates to improve memory error reporting Robert Richter
2019-05-29  8:44 ` [PATCH 01/21] EDAC, mc: Fix edac_mc_find() in case no device is found Robert Richter
2019-05-29  8:44 ` [PATCH 02/21] EDAC: Fixes to use put_device() after device_add() errors Robert Richter
2019-06-11 17:28   ` Borislav Petkov
2019-06-12 17:17     ` Robert Richter
2019-05-29  8:44 ` [PATCH 03/21] EDAC: Kill EDAC_DIMM_PTR() macro Robert Richter
2019-05-29  8:44 ` [PATCH 04/21] EDAC: Kill EDAC_DIMM_OFF() macro Robert Richter
2019-05-29  8:44 ` [PATCH 05/21] EDAC: Introduce mci_for_each_dimm() iterator Robert Richter
2019-05-29  8:44 ` [PATCH 06/21] EDAC, mc: Cleanup _edac_mc_free() code Robert Richter
2019-05-29  8:44 ` [PATCH 07/21] EDAC, mc: Remove per layer counters Robert Richter
2019-05-29  8:44 ` [PATCH 08/21] EDAC, mc: Rework edac_raw_mc_handle_error() to use struct dimm_info Robert Richter
2019-05-29  8:44 ` [PATCH 09/21] EDAC, ghes: Use standard kernel macros for page calculations Robert Richter
2019-05-29 15:13   ` James Morse
2019-05-29  8:44 ` [PATCH 10/21] EDAC, ghes: Remove pvt->detail_location string Robert Richter
2019-05-29 15:13   ` James Morse
2019-06-12 18:13     ` Robert Richter [this message]
2019-05-29  8:44 ` [PATCH 11/21] EDAC, ghes: Unify trace_mc_event() code with edac_mc driver Robert Richter
2019-05-29 15:12   ` James Morse
2019-06-03 13:10     ` Robert Richter
2019-06-04 17:15       ` James Morse
2019-06-13 22:23         ` Robert Richter
2019-05-29  8:44 ` [PATCH 12/21] EDAC, ghes: Add support for legacy API counters Robert Richter
2019-05-29 15:13   ` James Morse
2019-06-12 18:41     ` Robert Richter
2019-06-19 17:22       ` James Morse
2019-06-20  6:55         ` Robert Richter
2019-06-26  9:33           ` James Morse
2019-06-26 10:27             ` Robert Richter
2019-05-29  8:44 ` [PATCH 13/21] EDAC, ghes: Rework memory hierarchy detection Robert Richter
2019-05-29 15:06   ` James Morse
2019-05-31 13:41     ` Robert Richter
2019-05-29  8:44 ` [PATCH 14/21] EDAC, ghes: Extract numa node information for each dimm Robert Richter
2019-05-29 17:51   ` James Morse
2019-06-13 20:52     ` Robert Richter
2019-05-29  8:44 ` [PATCH 15/21] EDAC, ghes: Moving code around ghes_edac_register() Robert Richter
2019-05-29  8:44 ` [PATCH 16/21] EDAC, ghes: Create one memory controller device per node Robert Richter
2019-05-29  8:44 ` [PATCH 17/21] EDAC, ghes: Fill sysfs with the DMI DIMM label information Robert Richter
2019-05-29  8:44 ` [PATCH 18/21] EDAC, mc: Introduce edac_mc_alloc_by_dimm() for per dimm allocation Robert Richter
2019-05-29  8:44 ` [PATCH 19/21] EDAC, ghes: Identify dimm by node, card, module and handle Robert Richter
2019-05-29  8:44 ` [PATCH 20/21] EDAC, ghes: Enable per-layer reporting based on card/module Robert Richter
2019-05-29  8:44 ` [PATCH 21/21] EDAC, Documentation: Describe CPER module definition and DIMM ranks Robert Richter
2019-05-29 14:54 ` [PATCH 00/21] EDAC, mc, ghes: Fixes and updates to improve memory error reporting Borislav Petkov
2019-05-31 14:48   ` Robert Richter

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