git: hammer2 - Add HAMMER2_IO_DEBUG

[Matthew Dillon]

commit 3e3e52cc2039a01110ee28a94f3fec0d9c3d5521
Author: Matthew Dillon <***@apollo.backplane.com>
Date: Fri Dec 7 18:05:16 2018 -0800

hammer2 - Add HAMMER2_IO_DEBUG

* Add HAMMER2_IO_DEBUG (default disabled). This tracks callers
that use hammer2_io's. This eats a huge amount of (up to ~20GB)
of kernel memory.

Summary of changes:
sys/vfs/hammer2/hammer2.h | 116 +++++++++++++++++++++++++++++++++++++------
sys/vfs/hammer2/hammer2_io.c | 76 +++++++++++++++++++++-------
2 files changed, 158 insertions(+), 34 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/3e3e52cc2039a01110ee28a94f3fec0d9c3d5521