linux-kernel - Re: [ANNOUNCE] ktap 0.1 released

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Date:	Wed, 22 May 2013 11:29:41 +0800
From:	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>
To:	Jonathan Corbet <corbet@....net>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [ANNOUNCE] ktap 0.1 released

On 2013/5/22 6:19, Jonathan Corbet wrote:
> On Tue, 21 May 2013 11:56:14 +0800
> "zhangwei(Jovi)" <jovi.zhangwei@...wei.com> wrote:
> 
>> we welcome bug reports and fixes for the issues.
> 
> I'm messing with it...first impression:
> 
> 	unable create tracepoint event sys_enter_mmap on cpu 4, err: -19
> 	unable create tracepoint event sys_enter_mmap on cpu 5, err: -19
> 	unable create tracepoint event sys_enter_mmap on cpu 6, err: -19
> 	unable create tracepoint event sys_enter_mmap on cpu 7, err: -19
> 	[...]
> 
> Unsurprising, this is a four-core system.  The code reads:
> 
>> 	for_each_possible_cpu(cpu)
>> 		enable_tracepoint_on_cpu(cpu, &attr, call, arg, type);
> 
> Maybe that needs to be for_each_online_cpu() instead?
> 
Jon, Really thank you for this bug report, fixed it as your suggestion.

.jovi





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