On 2013/5/22 6:19, Jonathan Corbet wrote: > On Tue, 21 May 2013 11:56:14 +0800 > "zhangwei(Jovi)" <jovi.zhang...@huawei.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.
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