Messages in this thread | | | From | David Laight <> | Subject | RE: ftrace not showing the process names for all processes on syscall events | Date | Mon, 30 Mar 2020 18:14:37 +0000 |
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From: Steven Rostedt > Sent: 30 March 2020 19:08 > On Mon, 30 Mar 2020 15:34:08 +0000 > David Laight <David.Laight@ACULAB.COM> wrote: > > > Oh, does the 'function_graph' code ignore tail calls? > > Yes and no ;-) It works by dumb luck. As it was a year after function > graph tracing was live (some time in 2010 I believe) that someone brought > up tail calls, and I had to take a look at how it never crashed, and was > surprised that it "just worked". Here's a summary:
'Dumb luck' seems to be failing me :-) I'll look more closely tomorrow.
David
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