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SubjectRe: [RFC PATCH v4 2/5] napi: convert trace_napi_poll to TRACE_EVENT
On Wed, Jul 28, 2010 at 03:30:14PM +0900, Koki Sanagi wrote:
> From: Neil Horman <nhorman@tuxdriver.com>
>
> This patch converts trace_napi_poll from DECLARE_EVENT to TRACE_EVENT to improve
> the usability of napi_poll tracepoint.
>
> <idle>-0 [001] 241302.750777: napi_poll: napi poll on napi struct f6acc480 for device eth3
> <idle>-0 [000] 241302.852389: napi_poll: napi poll on napi struct f5d0d70c for device eth1
>
> An original patch is below.
> http://marc.info/?l=linux-kernel&m=126021713809450&w=2
> Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
>
> And add a fix by Steven Rostedt.
> http://marc.info/?l=linux-kernel&m=126150506519173&w=2
>
> Signed-off-by: Koki Sanagi <sanagi.koki@jp.fujitsu.com>
> ---
> include/trace/events/napi.h | 25 +++++++++++++++++++++++--
> 1 files changed, 23 insertions(+), 2 deletions(-)
>
Acked-by: Neil Horman <nhorman@tuxdriver.com>

> diff --git a/include/trace/events/napi.h b/include/trace/events/napi.h
> index 188deca..8fe1e93 100644
> --- a/include/trace/events/napi.h
> +++ b/include/trace/events/napi.h
> @@ -6,10 +6,31 @@
>
> #include <linux/netdevice.h>
> #include <linux/tracepoint.h>
> +#include <linux/ftrace.h>
> +
> +#define NO_DEV "(no_device)"
> +
> +TRACE_EVENT(napi_poll,
>
> -DECLARE_TRACE(napi_poll,
> TP_PROTO(struct napi_struct *napi),
> - TP_ARGS(napi));
> +
> + TP_ARGS(napi),
> +
> + TP_STRUCT__entry(
> + __field( struct napi_struct *, napi)
> + __string( dev_name, napi->dev ? napi->dev->name : NO_DEV)
> + ),
> +
> + TP_fast_assign(
> + __entry->napi = napi;
> + __assign_str(dev_name, napi->dev ? napi->dev->name : NO_DEV);
> + ),
> +
> + TP_printk("napi poll on napi struct %p for device %s",
> + __entry->napi, __get_str(dev_name))
> +);
> +
> +#undef NO_DEV
>
> #endif /* _TRACE_NAPI_H_ */
>
>
> --
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