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Message-ID: <20211015133504.6c0a9fcc@gandalf.local.home> Date: Fri, 15 Oct 2021 13:35:04 -0400 From: Steven Rostedt <rostedt@...dmis.org> To: Peter Zijlstra <peterz@...radead.org> Cc: LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...hat.com>, "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, Helge Deller <deller@....de>, Michael Ellerman <mpe@...erman.id.au>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, Josh Poimboeuf <jpoimboe@...hat.com>, Jiri Kosina <jikos@...nel.org>, Miroslav Benes <mbenes@...e.cz>, Petr Mladek <pmladek@...e.com>, Joe Lawrence <joe.lawrence@...hat.com>, Colin Ian King <colin.king@...onical.com>, Masami Hiramatsu <mhiramat@...nel.org>, Nicholas Piggin <npiggin@...il.com>, Jisheng Zhang <jszhang@...nel.org>, linux-csky@...r.kernel.org, linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org, live-patching@...r.kernel.org, 王贇 <yun.wang@...ux.alibaba.com>, Guo Ren <guoren@...nel.org> Subject: Re: [PATCH] tracing: Have all levels of checks prevent recursion On Fri, 15 Oct 2021 18:17:02 +0200 Peter Zijlstra <peterz@...radead.org> wrote: > On Fri, Oct 15, 2021 at 11:00:35AM -0400, Steven Rostedt wrote: > > From: "Steven Rostedt (VMware)" <rostedt@...dmis.org> > > > > While writing an email explaining the "bit = 0" logic for a discussion on > > > bit = trace_get_context_bit() + start; > > While there, you were also going to update that function to match/use > get_recursion_context(). Because your version is still branch hell. That would probably be a separate patch. This is just a fix to a design flaw, changing the context tests would be performance enhancement. Thanks for the reminder (as it was on my todo list to update that code). -- Steve
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