linux-kernel - Re: [PATCH] ftrace: Support full glob matching

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Message-ID: <20161005093635.3c9360ca@gandalf.local.home>
Date:   Wed, 5 Oct 2016 09:36:35 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Tom Zanussi <tom.zanussi@...ux.intel.com>
Subject: Re: [PATCH] ftrace: Support full glob matching

On Wed,  5 Oct 2016 20:58:15 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> Use glob_match() to support flexible glob wildcards (*,?)
> and character classes ([) for ftrace.
> Since the full glob matching is slower than the current
> partial matching routines(*pat, pat*, *pat*), this leaves
> those routines and just add MATCH_GLOB for complex glob
> expression.
> 
> e.g.
> ----
> [root@...alhost tracing]# echo 'sched*group' > set_ftrace_filter
> [root@...alhost tracing]# cat set_ftrace_filter
> sched_free_group
> sched_change_group
> sched_create_group
> sched_online_group
> sched_destroy_group
> sched_offline_group
> [root@...alhost tracing]# echo '[Ss]y[Ss]_*' > set_ftrace_filter
> [root@...alhost tracing]# head set_ftrace_filter
> sys_arch_prctl
> sys_rt_sigreturn
> sys_ioperm
> SyS_iopl
> sys_modify_ldt
> SyS_mmap
> SyS_set_thread_area
> SyS_get_thread_area
> SyS_set_tid_address
> sys_fork
> ----
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>

Nice! Although, I probably wont get to look at this till I get back
from Berlin. Please send me a friendly "ping" on the 17th.

I'll still add it to my new "todo" folder. Since, just marking patches
in my inbox as todo hasn't been working out for me, I've created a
separate folder for ftrace patches.

Thanks!

-- Steve