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authorPekka Paalanen <pq@iki.fi>2008-05-12 21:20:57 +0200
committerThomas Gleixner <tglx@linutronix.de>2008-05-24 11:24:53 +0200
commitbd8ac686c73c7e925fcfe0b02dc4e7b947127864 (patch)
tree7a675c4919429b507bb8e7b09677d96ae30ec561 /arch/x86/Kconfig.debug
parentf984b51e0779a6dd30feedc41404013ca54e5d05 (diff)
downloadop-kernel-dev-bd8ac686c73c7e925fcfe0b02dc4e7b947127864.zip
op-kernel-dev-bd8ac686c73c7e925fcfe0b02dc4e7b947127864.tar.gz
ftrace: mmiotrace, updates
here is a patch that makes mmiotrace work almost well within the tracing framework. The patch applies on top of my previous patch. I have my own output formatting in place now. Summary of changes: - fix the NULL dereference that was due to not calling tracing_reset() - add print_line() callback into struct tracer - implement print_line() for mmiotrace, producing up-to-spec text - add my output header, but that is not really called in the right place - rewrote the main structs in mmiotrace - added two new trace entry types: TRACE_MMIO_RW and TRACE_MMIO_MAP - made some functions in trace.c non-static - check current==NULL in tracing_generic_entry_update() - fix(?) comparison in trace_seq_printf() Things seem to work fine except a few issues. Markers (text lines injected into mmiotrace log) are missing, I did not feel hacking them in before we have variable length entries. My output header is printed only for 'trace' file, but not 'trace_pipe'. For some reason, despite my quick fix, iter->trace is NULL in print_trace_line() when called from 'trace_pipe' file, which means I don't get proper output formatting. I only tried by loading nouveau.ko, which just detects the card, and that is traced fine. I didn't try further. Map, two reads and unmap. Works perfectly. I am missing the information about overflows, I'd prefer to have a counter for lost events. I didn't try, but I guess currently there is no way of knowning when it overflows? So, not too far from being fully operational, it seems :-) And looking at the diffstat, there also is some 700-900 lines of user space code that just became obsolete. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/Kconfig.debug')
-rw-r--r--arch/x86/Kconfig.debug2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 7e4b849..1d6de0d 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -173,7 +173,7 @@ config MMIOTRACE_HOOKS
config MMIOTRACE
bool "Memory mapped IO tracing"
- depends on DEBUG_KERNEL && RELAY
+ depends on DEBUG_KERNEL
select TRACING
select MMIOTRACE_HOOKS
default y
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