problem in running example script

[ch huang]

when i run example script mmwriteback.stp ,it seems not probe point found?

# stap mmwriteback.stp
semantic error: no match while resolving probe point
kernel.trace("mm_pdflush_bgwriteout")
semantic error: no match while resolving probe point
kernel.trace("mm_pdflush_kupdate")
semantic error: no match while resolving probe point
kernel.trace("mm_pagereclaim_pgout")
Pass 2: analysis failed.  Try again with another '--vp 01' option.


# uname -r
2.6.18-92.el5xen