Dtrace release 20111026

This release is an interim release. It fixes the issue I wrote about
earlier, but likely will not compile on kernels earlier than 2.6.39.

It is the first working example of the vminfo provider. Heres a small
sample of the vminfo probes:

   48     vminfo            pgmajfault
   49     vminfo            unevictable_mlockfreed
   50     vminfo            pgfree
   51     vminfo            unevictable_mlockfreed
   52     vminfo            compactsuccess
   53     vminfo            compactfail
   54     vminfo            pgdeactivate
   55     vminfo            pgrotated
   56     vminfo            pgactivate
   57     vminfo            kswapd_low_wmark_hit_quickly
   58     vminfo            kswapd_high_wmark_hit_quickly

These correspond to the entries in /proc/vmstat and you can now intercept
calls to them, e.g.

$ dtrace -n pgmajfault
...

I will attempt to update the release to fix the broken earlier kernels
shortly.

(Getting the /proc/vmstats stuff involves examining an enum and isnt amenable
to #ifdef coding practise, so I may need to autodetect which ones are
available for the current kernel).

Post created by CRiSP v10.0.17a-b6101