On Wed, 2016-01-13 at 12:59 +0800, Jinhua Luo wrote: Hi All,
Without vdso files and its debuginfo files, the systemtap could not unwind the user backtrace when the process is interrupted mid-syscall. It's important for off-cpu profiling. See https://sourceware.org/ml/systemtap/2016-q1/msg00021.html for the issue. The ubuntu (14.04) also do vdso_install for the kernel pckage. Thanks for reporting this. It should be fixed in the next upload to unstable. Ben. -- Ben Hutchings Unix is many things to many people, but it's never been everything to anybody.
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