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Date: Sat, 01 Nov 2008 19:53:34 +0100 From: Peter Zijlstra <a.p.zijlstra@...llo.nl> To: Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org> Cc: linux-kernel <linux-kernel@...r.kernel.org> Subject: [PATCH] ftrace: sysrq-z to dump the buffers Allows one to force an ftrace dump from sysrq Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl> --- diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c index ce0d9da..e20d6db 100644 --- a/drivers/char/sysrq.c +++ b/drivers/char/sysrq.c @@ -274,6 +274,22 @@ static struct sysrq_key_op sysrq_showstate_blocked_op = { .enable_mask = SYSRQ_ENABLE_DUMP, }; +#ifdef CONFIG_FTRACE +#include <linux/ftrace.h> + +static void sysrq_ftrace_dump(int key, struct tty_struct *tty) +{ + ftrace_dump(); +} +static struct sysrq_key_op sysrq_ftrace_dump_op = { + .handler = sysrq_ftrace_dump, + .help_msg = "dumpZ-ftrace-buffer", + .action_msg = "Dump ftrace buffer", + .enable_mask = SYSRQ_ENABLE_DUMP, +}; +#else +#define sysrq_ftrace_dump_op (*(struct sysrq_key_op *)0) +#endif static void sysrq_handle_showmem(int key, struct tty_struct *tty) { @@ -406,7 +422,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = { NULL, /* x */ /* y: May be registered on sparc64 for global register dump */ NULL, /* y */ - NULL /* z */ + &sysrq_ftrace_dump_op, /* z */ }; /* key2index calculation, -1 on invalid index */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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