Re: [PATCH v7 14/28] tracing: Add a trace remote module for testing
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2025-10-16 21:11:55
Also in:
kvmarm, linux-arm-kernel, lkml
On Thu, 16 Oct 2025 17:06:45 -0400 Steven Rostedt [off-list ref] wrote:
On Fri, 3 Oct 2025 14:38:11 +0100 Vincent Donnefort [off-list ref] wrote:quoted
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 918afcc1fcaf..52131d89993c 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig@@ -1244,4 +1244,12 @@ config TRACE_REMOTE config SIMPLE_RING_BUFFER bool +config TRACE_REMOTE_TEST + tristate "Test module for remote tracing" + select TRACE_REMOTE + select SIMPLE_RING_BUFFER + help + This trace remote includes a ring-buffer writer implementation using + "simple_ring_buffer". This is solely intending for testing. +Nit, this should go up a few places so that it's with the other "test module" selections.
And when I tried to build it, I hit this: GEN .vmlinux.objs MODPOST Module.symvers ERROR: modpost: "simple_ring_buffer_reserve" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "simple_ring_buffer_commit" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "simple_ring_buffer_unload" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "trace_remote_free_buffer" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "trace_remote_alloc_buffer" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "simple_ring_buffer_init" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "trace_remote_register" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "simple_ring_buffer_reset" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "simple_ring_buffer_swap_reader_page" [kernel/trace/remote_test.ko] undefined! ERROR: modpost: "simple_ring_buffer_enable_tracing" [kernel/trace/remote_test.ko] undefined! WARNING: modpost: suppressed 1 unresolved symbol warnings because there were too many) make[3]: *** [/work/git/linux-trace.git/scripts/Makefile.modpost:147: Module.symvers] Error 1 make[2]: *** [/work/git/linux-trace.git/Makefile:1960: modpost] Error 2 make[1]: *** [/work/git/linux-trace.git/Makefile:248: __sub-make] Error 2 make[1]: Leaving directory '/work/build/nobackup/debiantesting-x86-64' make: *** [Makefile:248: __sub-make] Error 2 -- Steve