Patchwork [v4,2/5] napi: convert trace_napi_poll to TRACE_EVENT

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Submitter Koki Sanagi
Date Aug. 23, 2010, 9:43 a.m.
Message ID <4C7242D7.4050009@jp.fujitsu.com>
Download mbox | patch
Permalink /patch/62457/
State Awaiting Upstream
Delegated to: David Miller
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Comments

Koki Sanagi - Aug. 23, 2010, 9:43 a.m.
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(-)


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David Miller - Aug. 24, 2010, 3:52 a.m.
From: Koki Sanagi <sanagi.koki@jp.fujitsu.com>
Date: Mon, 23 Aug 2010 18:43:51 +0900

> 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>

Acked-by: David S. Miller <davem@davemloft.net>
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Patch

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_ */