K 10
svn:author
V 3
zbb
K 8
svn:date
V 27
2015-07-21T15:28:07.916231Z
K 7
svn:log
V 591
Don't allow malloc() to wait for resource while holding a lock in ITS

malloc() should not go to sleep in case of lack of resource while
the kernel thread is holding a non-sleepable lock.

- change malloc() flags to M_NOWAIT in such cases implement
  lpi_free_chunk() routine as it will be needed when ITT
  allocation fails in its_device_alloc_locked()
- do not increase verbosity of this code since upper layers will
  communicate an error if the interrupt setup fails

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3121

END