tree 9347ba3d361ccf5046865f9049f1cf68757fd1d9
parent a2fc0421e4e94ed17cf88897efc4f92a2656ad54
author Andiry Xu <jix024@cs.ucsd.edu> 1520705944 -0800
committer Dan Williams <dan.j.williams@intel.com> 1520808681 -0700

Sysfs support.

Sysfs support allows user to get/post information of running NOVA instance.
After mount, NOVA creates four entries under proc directory
/proc/fs/nova/pmem#/:

timing_stats	IO_stats	allocator	gc

Show NOVA file operation timing statistics:
cat /proc/fs/NOVA/pmem#/timing_stats

Clear timing statistics:
echo 1 > /proc/fs/NOVA/pmem#/timing_stats

Show NOVA I/O statistics:
cat /proc/fs/NOVA/pmem#/IO_stats

Clear I/O statistics:
echo 1 > /proc/fs/NOVA/pmem#/IO_stats

Show NOVA allocator information:
cat /proc/fs/NOVA/pmem#/allocator

Manual garbage collection:
echo #inode_number > /proc/fs/NOVA/pmem#/gc

Signed-off-by: Andiry Xu <jix024@cs.ucsd.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>