Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h

[PATCH 0/2] tracing: Move trace_printk.h out of kernel.h · Steven Rostedt <rostedt@kernel.org> · 2026-06-21
[PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h · Steven Rostedt <rostedt@kernel.org> · 2026-06-21
Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h · Steven Rostedt <rostedt@goodmis.org> · 2026-06-21
Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h · Yury Norov <yury.norov@gmail.com> · 2026-06-21
Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h · Yury Norov <yury.norov@gmail.com> · 2026-06-21
Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h · Thomas Gleixner <tglx@kernel.org> · 2026-06-21
Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h · Steven Rostedt <rostedt@goodmis.org> · 2026-06-21
Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h · David Laight <hidden> · 2026-06-21
Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h · Steven Rostedt <rostedt@kernel.org> · 2026-06-21
[PATCH 1/2] tracing: Move non-trace_printk prototypes back to kernel.h · Steven Rostedt <rostedt@kernel.org> · 2026-06-21
Re: [PATCH 1/2] tracing: Move non-trace_printk prototypes back to kernel.h · Yury Norov <yury.norov@gmail.com> · 2026-06-21
Re: [PATCH 1/2] tracing: Move non-trace_printk prototypes back to kernel.h · Steven Rostedt <rostedt@goodmis.org> · 2026-06-21
Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h · "Christophe Leroy (CS GROUP)" <chleroy@kernel.org> · 2026-06-22
Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h · Steven Rostedt <rostedt@kernel.org> · 2026-06-22
Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h · Yury Norov <yury.norov@gmail.com> · 2026-06-22
Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h · Peter Zijlstra <peterz@infradead.org> · 2026-06-22
Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h · Steven Rostedt <rostedt@kernel.org> · 2026-06-22
Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h · Randy Dunlap <hidden> · 2026-06-22
Re: [PATCH 0/2] tracing: Move trace_printk.h out of kernel.h · Steven Rostedt <rostedt@kernel.org> · 2026-06-22

From: Yury Norov <yury.norov@gmail.com>
Date: 2026-06-22 13:11:51
Also in: dri-devel, intel-gfx, kvm, linux-arm-kernel, linux-doc, linux-ext4, linux-kbuild, linux-nfs, linux-rdma, linux-trace-kernel, linux-usb, lkml

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)" [off-list ref] wrote:

quoted

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.

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