On Mon, 14 Mar 2011, Frank Ch. Eigler wrote:
> akpm wrote:
>
> > [...] How do you envisage these features actually get used?
>
> Patch #20/20 in the set includes an ftrace-flavoured debugfs frontend.
And you really think that:
# cd /sys/kernel/debug/tracing/
# cat /proc/`pgrep zsh`/maps | grep /bin/zsh | grep r-xp
00400000-0048a000 r-xp 00000000 08:03 130904 /bin/zsh
# objdump -T /bin/zsh | grep -w zfree
0000000000446420 g DF .text 0000000000000012 Base zfree
# echo 'p /bin/zsh:0x46420 %ip %ax' > uprobe_events
# cat uprobe_events
p:uprobes/p_zsh_0x46420 /bin/zsh:0x0000000000046420
> TODO: Documentation/trace/uprobetrace.txt
without a reasonable documentation how to use that is a brilliant
argument?
> Previous versions of the patchset included perf front-ends too, which
> are probably to be seen again.
Ahh, probably. What does that mean?
And if that probably happens, what interface is that supposed to
use?
The above magic wrapped into perf ?
Or some sensible implementation ?
Thanks,
tglx
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