]> git.karo-electronics.de Git - karo-tx-linux.git/commit
tracing/stacktrace: Show entire trace if passed in function not found
authorSteven Rostedt <rostedt@goodmis.org>
Fri, 29 Jan 2016 15:22:41 +0000 (10:22 -0500)
committerSteven Rostedt <rostedt@goodmis.org>
Fri, 29 Jan 2016 17:19:10 +0000 (12:19 -0500)
commit6ccd83714a009ee301b50c15f6c3a5dc1f30164c
treee9b16f16bd6558120805a2d03d2a1dd0db27d2f0
parent92e963f50fc74041b5e9e744c330dca48e04f08d
tracing/stacktrace: Show entire trace if passed in function not found

When a max stack trace is discovered, the stack dump is saved. In order to
not record the overhead of the stack tracer, the ip of the traced function
is looked for within the dump. The trace is started from the location of
that function. But if for some reason the ip is not found, the entire stack
trace is then truncated. That's not very useful. Instead, print everything
if the ip of the traced function is not found within the trace.

This issue showed up on s390.

Link: http://lkml.kernel.org/r/20160129102241.1b3c9c04@gandalf.local.home
Fixes: 72ac426a5bb0 ("tracing: Clean up stack tracing and fix fentry updates")
Cc: stable@vger.kernel.org # v4.3+
Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Tested-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/trace_stack.c