On Thu, May 15, 2014 at 04:30:45AM -0400, Chen, Gong wrote:
> 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 to print event log
> to the console. On the other hand, if this file is closed,
> kernel will print event log to the console again.
>
> v3 -> v2: minor adjustment to make flow cleanly.
> v2 -> v1: move counter operation from *read* to *open*.
>
> Signed-off-by: Chen, Gong <gong.chen@xxxxxxxxxxxxxxx>
> ---
> drivers/acpi/acpi_extlog.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
> index b1dcb5b..c1dab37 100644
> --- a/drivers/acpi/acpi_extlog.c
> +++ b/drivers/acpi/acpi_extlog.c
> @@ -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>
>
> @@ -185,7 +186,11 @@ 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() == 0) {
if (!ras_userspace_consumers())
> + print_extlog_rcd(NULL, tmp, cpu);
> + goto out;
> + }
>
> /* log event via trace */
> err_count++;
> @@ -202,6 +207,7 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
> gdata->error_severity, mem_err);
> }
>
> +out:
> return NOTIFY_STOP;
> }
>
> --
> 2.0.0.rc0
>
>
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
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