Hello Community,
A very happy new year to all of you!! :)
Had some query on BUFFER_TRACE macro. Here it goes:-
While debugging some issue w.r.t jbd2/bh I came across this empty macro
definition of BUFFER_TRACE in include/linux/jbd2.h.
Though this is called from multiple places, but I could not find any
definition of this as such.
I could see some patches on mailing list which are still calling this
macro. So that means I am definitely missing something here.
Could you please help me understand how can one use this "BUFFER_TRACE"
macro for debugging? I could not find any ftrace event related
to this macro.
For my debugging as of now I ended up creating a file in
include/trace/events/buffer_debug.h and added the definition
of BUFFER_TRACE macro there.
On more googling I did find some old patch which enabled
CONFIG_BUFFER_DEBUG.
http://people.redhat.com/sct/patches/ext3-2.4/for-2.4.19/98-debug/00-ext3-debug.patch
But this seemed pretty old and I could not find anything latest on this
which is related to above patch.
Any pointers pls?
-ritesh
