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Mon, 22 Jun 2026 06:11:50 -0700 (PDT) Received: from localhost ([38.101.158.131]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-66314ac3f96sm3600882d50.1.2026.06.22.06.11.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jun 2026 06:11:50 -0700 (PDT) From: Yury Norov X-Google-Original-From: Yury Norov Date: Mon, 22 Jun 2026 09:11:49 -0400 To: Steven Rostedt Cc: "Christophe Leroy (CS GROUP)" , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Linus Torvalds , Sebastian Andrzej Siewior , John Ogness , Thomas Gleixner , Peter Zijlstra , Julia Lawall , Yury Norov , linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-rdma@vger.kernel.org, linux-usb@vger.kernel.org, linux-ext4@vger.kernel.org, linux-nfs@vger.kernel.org, kvm@vger.kernel.org, intel-gfx@lists.freedesktop.org Subject: Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h Message-ID: References: <20260621093430.264983361@kernel.org> <20260622090826.20efadb3@fedora> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260622090826.20efadb3@fedora> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260622_061152_299581_CB67D359 X-CRM114-Status: GOOD ( 18.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jun 22, 2026 at 09:08:26AM -0400, Steven Rostedt wrote: > On Mon, 22 Jun 2026 10:05:13 +0200 > "Christophe Leroy (CS GROUP)" wrote: > > > > There's been complaints about trace_printk() being defined in kernel.h as it > > > can increase the compilation time. As it is only used by some developers for > > > debugging purposes, it should not be in kernel.h causing lots of wasted CPU > > > cycles for those that do not ever care about it. > > > > Do we have a measurement of the increased compilation time ? > > I believe Yury does. I re-run compilation is a more strict environment, and the difference is negligible.