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trace, eMCA: Add a knob to adjust where to save event log 

To avoid saving two copies for one H/W event, add a new
file under debugfs to control how to save event log.
Once this file is opened, the perf/trace will be used,
in the meanwhile, kernel will stop printing event log
to the console. On the other hand, if this file is closed,
kernel will print event log to the console again.

Signed-off-by: Chen, Gong <gong.chen@linux.intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Chen, Gong 2014-06-11 04:34:50 -04:00 committed by Tony Luck
parent 2dfb7d51a6
commit d6cae935ec
1 changed files with 7 additions and 1 deletions
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8
drivers/acpi/acpi_extlog.c
View File

@ -12,6 +12,7 @@
#include <linux/cper.h>
#include <linux/ratelimit.h>
#include <linux/edac.h>
#include <linux/ras.h>
#include <asm/cpu.h>
#include <asm/mce.h>
@ -154,7 +155,11 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
estatus->block_status = 0;
tmp = (struct acpi_generic_status *)elog_buf;
print_extlog_rcd(NULL, tmp, cpu);
if (!ras_userspace_consumers()) {
print_extlog_rcd(NULL, tmp, cpu);
goto out;
}
/* log event via trace */
err_seq++;
@ -171,6 +176,7 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
(u8)gdata->error_severity);
}
out:
return NOTIFY_STOP;
}