linux-kernel - Re: [PATCH 7/8] ACPI, APEI, CPER: Cleanup CPER memory error output format

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Message-ID: <20131014045500.GC12189@gchen.bj.intel.com>
Date:	Mon, 14 Oct 2013 00:55:00 -0400
From:	Chen Gong <gong.chen@...ux.intel.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	tony.luck@...el.com, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH 7/8] ACPI, APEI, CPER: Cleanup CPER memory error output
 format

On Fri, Oct 11, 2013 at 06:02:08PM +0200, Borislav Petkov wrote:
> Date: Fri, 11 Oct 2013 18:02:08 +0200
> From: Borislav Petkov <bp@...en8.de>
> To: "Chen, Gong" <gong.chen@...ux.intel.com>
> Cc: tony.luck@...el.com, linux-kernel@...r.kernel.org,
>  linux-acpi@...r.kernel.org
> Subject: Re: [PATCH 7/8] ACPI, APEI, CPER: Cleanup CPER memory error output
>  format
> User-Agent: Mutt/1.5.21 (2010-09-15)
> 
> On Fri, Oct 11, 2013 at 02:32:45AM -0400, Chen, Gong wrote:
> > Keep up only the most important fields for memory error
> > reporting. The detail information will be moved to perf/trace
> > interface.
> > 
> > Suggested-by: Tony Luck <tony.luck@...el.com>
> > Signed-off-by: Chen, Gong <gong.chen@...ux.intel.com>
> > ---
> >  drivers/acpi/apei/cper.c | 42 ++++++++++++++----------------------------
> >  1 file changed, 14 insertions(+), 28 deletions(-)
> > 
> > diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
> > index 2a4389f..567410e 100644
> > --- a/drivers/acpi/apei/cper.c
> > +++ b/drivers/acpi/apei/cper.c
> > @@ -206,29 +206,29 @@ static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem)
> >  		printk("%s""physical_address_mask: 0x%016llx\n",
> >  		       pfx, mem->physical_addr_mask);
> >  	if (mem->validation_bits & CPER_MEM_VALID_NODE)
> > -		printk("%s""node: %d\n", pfx, mem->node);
> > +		pr_debug("node: %d\n", mem->node);
> >  	if (mem->validation_bits & CPER_MEM_VALID_CARD)
> > -		printk("%s""card: %d\n", pfx, mem->card);
> > +		pr_debug("card: %d\n", mem->card);
> >  	if (mem->validation_bits & CPER_MEM_VALID_MODULE)
> > -		printk("%s""module: %d\n", pfx, mem->module);
> > +		pr_debug("module: %d\n", mem->module);
> >  	if (mem->validation_bits & CPER_MEM_VALID_RANK_NUMBER)
> > -		printk("%s""rank: %d\n", pfx, mem->rank);
> > +		pr_debug("rank: %d\n", mem->rank);
> >  	if (mem->validation_bits & CPER_MEM_VALID_BANK)
> > -		printk("%s""bank: %d\n", pfx, mem->bank);
> > +		pr_debug("bank: %d\n", mem->bank);
> >  	if (mem->validation_bits & CPER_MEM_VALID_DEVICE)
> > -		printk("%s""device: %d\n", pfx, mem->device);
> > +		pr_debug("device: %d\n", mem->device);
> >  	if (mem->validation_bits & CPER_MEM_VALID_ROW)
> > -		printk("%s""row: %d\n", pfx, mem->row);
> > +		pr_debug("row: %d\n", mem->row);
> >  	if (mem->validation_bits & CPER_MEM_VALID_COLUMN)
> > -		printk("%s""column: %d\n", pfx, mem->column);
> > +		pr_debug("column: %d\n", mem->column);
> >  	if (mem->validation_bits & CPER_MEM_VALID_BIT_POSITION)
> > -		printk("%s""bit_position: %d\n", pfx, mem->bit_pos);
> > +		pr_debug("bit_position: %d\n", mem->bit_pos);
> >  	if (mem->validation_bits & CPER_MEM_VALID_REQUESTOR_ID)
> > -		printk("%s""requestor_id: 0x%016llx\n", pfx, mem->requestor_id);
> > +		pr_debug("requestor_id: 0x%016llx\n", mem->requestor_id);
> >  	if (mem->validation_bits & CPER_MEM_VALID_RESPONDER_ID)
> > -		printk("%s""responder_id: 0x%016llx\n", pfx, mem->responder_id);
> > +		pr_debug("responder_id: 0x%016llx\n", mem->responder_id);
> >  	if (mem->validation_bits & CPER_MEM_VALID_TARGET_ID)
> > -		printk("%s""target_id: 0x%016llx\n", pfx, mem->target_id);
> > +		pr_debug("target_id: 0x%016llx\n", mem->target_id);
> >  	if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE) {
> >  		u8 etype = mem->error_type;
> >  		printk("%s""error_type: %d, %s\n", pfx, etype,
> 
> Hmm, so this cper_print_mem is called for CPER_SEC_PLATFORM_MEM section
> type.
> 
> With the change above, the other caller __ghes_print_estatus() won't see
> the error messages if they're debug. Do we want that?
> 

Because most of data in CPER are empty or unimportant. To avoid too much
disturbance to end users, it is worthy to do that. Moreover, I reserve
another way via trace to show these data.

> -- 
> Regards/Gruss,
>     Boris.
> 
> Sent from a fat crate under my desk. Formatting is fine.
> --

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