powerpc/xmon: Dump ftrace buffers for the current CPU only (4125d012) · Commits · 戴 / test

Current xmon 'dt' command dumps the tracing buffer for all the CPUs, which makes it very hard to read due to the fact that most of powerpc machines currently have many CPUs. Other than that, the CPU lines are interleaved in the ftrace log. This new option just dumps the ftrace buffer for the current CPU. Signed-off-by:

Breno Leitao <leitao@debian.org> Acked-by:

Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by:

Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/xmon/xmon.c

+19 −3

Original line number	Diff line number	Diff line
		@@ -234,6 +234,7 @@ Commands:\n\
		"\
		dr dump stream of raw bytes\n\
		dt dump the tracing buffers (uses printk)\n\
		dtc dump the tracing buffers for current CPU (uses printk)\n\
		"
		#ifdef CONFIG_PPC_POWERNV
		" dx# dump xive on CPU #\n\
		@@ -2231,6 +2232,19 @@ static void xmon_rawdump (unsigned long adrs, long ndump)
		printf("\n");
		}

		static void dump_tracing(void)
		{
		int c;

		c = inchar();
		if (c == 'c')
		ftrace_dump(DUMP_ORIG);
		else
		ftrace_dump(DUMP_ALL);

		tracing_on();
		}

		#ifdef CONFIG_PPC64
		static void dump_one_paca(int cpu)
		{
		@@ -2507,6 +2521,11 @@ dump(void)
		}
		#endif

		if (c == 't') {
		dump_tracing();
		return;
		}

		if (c == '\n')
		termch = c;

		@@ -2525,9 +2544,6 @@ dump(void)
		dump_log_buf();
		} else if (c == 'o') {
		dump_opal_msglog();
		} else if (c == 't') {
		ftrace_dump(DUMP_ALL);
		tracing_on();
		} else if (c == 'r') {
		scanhex(&ndump);
		if (ndump == 0)

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