[Ocfs2-devel] o2net timing stats

[Sunil Mushran]

Patches replace struct timeval with ktime_t (hrtimer) to track o2net
timings in struct o2net_send_tracking and struct o2net_sock_container.

Also maintains a cumulative total of all the times that is user accessible
via a debugfs file, o2net/stats.

The stats are enabled with CONFIG_OCFS2_FS_STATS which itself has been
made dependent on CONFIG_DEBUG_FS.

Sunil