From: Steven Rostedt <rostedt@goodmis.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arch@vger.kernel.org,
Joel Fernandes <joel@joelfernandes.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Andy Lutomirski <luto@kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
stable@kernel.org
Subject: Re: [for-next][PATCH 15/18] function_graph: Use new curr_ret_depth to manage depth instead of curr_ret_stack
Date: Fri, 23 Nov 2018 09:14:47 -0500 [thread overview]
Message-ID: <20181123091447.0e2eed1b@vmware.local.home> (raw)
In-Reply-To: <20181122100322.GN2131@hirez.programming.kicks-ass.net>
On Thu, 22 Nov 2018 11:03:22 +0100
Peter Zijlstra <peterz@infradead.org> wrote:
> On Wed, Nov 21, 2018 at 07:28:16PM -0500, Steven Rostedt wrote:
> > @@ -188,14 +186,20 @@ int function_graph_enter(unsigned long ret, unsigned long func,
> > struct ftrace_graph_ent trace;
> >
> > trace.func = func;
> > - trace.depth = current->curr_ret_stack + 1;
> > + trace.depth = ++current->curr_ret_depth;
> >
> > /* Only trace if the calling function expects to */
> > if (!ftrace_graph_entry(&trace))
> > - return -EBUSY;
> > + goto out;
> >
> > - return ftrace_push_return_trace(ret, func, &trace.depth,
> > - frame_pointer, retp);
> > + if (ftrace_push_return_trace(ret, func,
> > + frame_pointer, retp))
>
> You can unwrap that line, by my counting that's at 69 chars, so unless
> you're editing on a C64 it should fit your screen.
Thanks I may add a clean up patch. I already ran this code under
several hours of testing, and only plan on touching it if there's more
than cosmetic issues.
The reason that looks like that is because I just massaged the line it
replaced, and didn't take into account that I could now make it into a
single line.
>
> > + goto out;
> > +
> > + return 0;
> > + out:
> > + current->curr_ret_depth--;
> > + return -EBUSY;
> > }
>
> [diff "default"]
> xfuncname = "^[[:alpha:]$_].*[^:]$"
>
> avoids the need for that ludicrous label indenting.
I still prefer the 'space', and it fits with the rest of the file ;-)
TomAYto / TomAHto
>
> Also, "error" might be a better label name.
True. I'll add that on top too, but for the stable/rc release, that
isn't needed.
Thanks for taking a look at this code.
-- Steve
next prev parent reply other threads:[~2018-11-23 14:14 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-22 0:28 [for-next][PATCH 00/18] function_graph: Add separate depth counter to prevent trace corruption Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 01/18] function_graph: Create function_graph_enter() to consolidate architecture code Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 02/18] x86/function_graph: Simplify with function_graph_entry() Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 03/18] ARM: function_graph: " Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 04/18] arm64: " Steven Rostedt
2018-11-27 18:07 ` Will Deacon
2018-11-27 18:26 ` Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 05/18] microblaze: " Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 06/18] MIPS: " Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 07/18] nds32: " Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 08/18] parisc: " Steven Rostedt
[not found] ` <20181123073033.2083020863@mail.kernel.org>
2018-11-23 9:06 ` Helge Deller
2018-11-23 17:12 ` Steven Rostedt
2018-11-23 18:34 ` Sasha Levin
2018-11-23 19:26 ` Steven Rostedt
2018-11-23 20:00 ` Sasha Levin
2018-11-24 18:46 ` Steven Rostedt
2018-12-03 14:54 ` Sasha Levin
2018-11-22 0:28 ` [for-next][PATCH 09/18] powerpc/function_graph: " Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 10/18] riscv/function_graph: " Steven Rostedt
2018-11-26 16:47 ` Palmer Dabbelt
2018-11-22 0:28 ` [for-next][PATCH 11/18] s390/function_graph: " Steven Rostedt
2018-11-22 6:43 ` Martin Schwidefsky
2018-11-23 17:15 ` Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 12/18] sh/function_graph: " Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 13/18] sparc/function_graph: " Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 14/18] function_graph: Make ftrace_push_return_trace() static Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 15/18] function_graph: Use new curr_ret_depth to manage depth instead of curr_ret_stack Steven Rostedt
2018-11-22 10:03 ` Peter Zijlstra
2018-11-23 14:14 ` Steven Rostedt [this message]
2018-11-22 0:28 ` [for-next][PATCH 16/18] function_graph: Move return callback before update " Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 17/18] function_graph: Reverse the order of pushing the ret_stack and the callback Steven Rostedt
2018-11-22 0:28 ` [for-next][PATCH 18/18] function_graph: Have profiler use curr_ret_stack and not depth Steven Rostedt
2018-11-26 5:15 ` [for-next][PATCH 00/18] function_graph: Add separate depth counter to prevent trace corruption Masami Hiramatsu
2018-11-28 20:39 ` Joe Lawrence
2018-11-28 21:00 ` Steven Rostedt
2018-11-29 3:29 ` Steven Rostedt
2018-11-29 4:24 ` Steven Rostedt
2018-11-29 15:08 ` Joe Lawrence
2018-11-29 16:17 ` Steven Rostedt
2018-11-29 16:32 ` Joe Lawrence
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