[PATCH] ftrace: change the export format of trace_kfree_skb()

[PATCH] ftrace: change the export format of trace_kfree_skb()

[Xiao Guangrong]

Use %pf instead of %p to output the function's address, use 0x%04X instead
of %u to output the skb's protocol

Before patch:

          <idle>-0     [000] 60144.542521: kfree_skb: skbaddr=de7b8240 protocol=2048 location=c1365429
          <idle>-0     [000] 60164.488153: kfree_skb: skbaddr=da66f900 protocol=2048 location=c1365429
          <idle>-0     [000] 60193.493933: kfree_skb: skbaddr=deaeb480 protocol=4 location=c134ec25
          <idle>-0     [000] 60253.118421: kfree_skb: skbaddr=de7c4900 protocol=4 location=c134ec25
          
After patch:

            bash-2587  [001] 97685.781173: kfree_skb: skbaddr=deb9cc00 protocol=0x0000 location=netlink_unicast
            bash-2587  [000] 97686.501121: kfree_skb: skbaddr=df9bb840 protocol=0x0000 location=netlink_unicast
          <idle>-0     [000] 97696.200184: kfree_skb: skbaddr=df741240 protocol=0x0800 location=ip_rcv
          <idle>-0     [000] 97696.200198: kfree_skb: skbaddr=dfb3de40 protocol=0x0800 location=ip_rcv

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
---
 include/trace/events/skb.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
 mode change 100644 => 100755 include/trace/events/skb.h

diff --git a/include/trace/events/skb.h b/include/trace/events/skb.h
old mode 100644
new mode 100755
index 1e8fabb..a58bef8
--- a/include/trace/events/skb.h
+++ b/include/trace/events/skb.h
@@ -30,7 +30,7 @@ TRACE_EVENT(kfree_skb,
 		__entry->location = location;
 	),
 
-	TP_printk("skbaddr=%p protocol=%u location=%p",
+	TP_printk("skbaddr=%p protocol=0x%04X location=%pf",
 		__entry->skbaddr, __entry->protocol, __entry->location)
 );
 
-- 
1.6.1.2

Re: [PATCH] ftrace: change the export format of trace_kfree_skb()

[Neil Horman]

On Mon, Jun 08, 2009 at 05:18:55PM +0800, Xiao Guangrong wrote:
> Use %pf instead of %p to output the function's address, use 0x%04X instead
> of %u to output the skb's protocol
> 
> Before patch:
> 
>           <idle>-0     [000] 60144.542521: kfree_skb: skbaddr=de7b8240 protocol=2048 location=c1365429
>           <idle>-0     [000] 60164.488153: kfree_skb: skbaddr=da66f900 protocol=2048 location=c1365429
>           <idle>-0     [000] 60193.493933: kfree_skb: skbaddr=deaeb480 protocol=4 location=c134ec25
>           <idle>-0     [000] 60253.118421: kfree_skb: skbaddr=de7c4900 protocol=4 location=c134ec25
>           
> After patch:
> 
>             bash-2587  [001] 97685.781173: kfree_skb: skbaddr=deb9cc00 protocol=0x0000 location=netlink_unicast
>             bash-2587  [000] 97686.501121: kfree_skb: skbaddr=df9bb840 protocol=0x0000 location=netlink_unicast
>           <idle>-0     [000] 97696.200184: kfree_skb: skbaddr=df741240 protocol=0x0800 location=ip_rcv
>           <idle>-0     [000] 97696.200198: kfree_skb: skbaddr=dfb3de40 protocol=0x0800 location=ip_rcv
> 
> Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
> ---
>  include/trace/events/skb.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>  mode change 100644 => 100755 include/trace/events/skb.h
> 
> diff --git a/include/trace/events/skb.h b/include/trace/events/skb.h
> old mode 100644
> new mode 100755
> index 1e8fabb..a58bef8
> --- a/include/trace/events/skb.h
> +++ b/include/trace/events/skb.h
> @@ -30,7 +30,7 @@ TRACE_EVENT(kfree_skb,
>  		__entry->location = location;
>  	),
>  
> -	TP_printk("skbaddr=%p protocol=%u location=%p",
> +	TP_printk("skbaddr=%p protocol=0x%04X location=%pf",
>  		__entry->skbaddr, __entry->protocol, __entry->location)
>  );

No objection to the code change, but whats with the new mode?  Why are you
making the file executable?

Neil

Re: [PATCH] ftrace: change the export format of trace_kfree_skb()

[Xiao Guangrong]

Neil Horman wrote:
> 
> No objection to the code change, but whats with the new mode?  Why are you
> making the file executable?
> 

Hi Neil:

Thanks for your review, this is my mistake, I'll fix it in v2 patch.

Thanks,
Xiao Guangrong

> Neil
> 
> 
>