Module Name:	syssrc
Committed By:	thorpej
Date:		Fri Mar  8 21:42:00 UTC 2002

Modified Files:
	syssrc/sys/kern: subr_pool.c
	syssrc/sys/sys: pool.h

Log Message:
Add an optional "drain" client callback, which can be set by the new
pool_set_drain_hook().  This hook is called in three cases:
* When a pool has hit the hard limit, just before either erroring
  out or sleeping.
* When a backend allocator fails to allocate memory.
* Just before trying to reclaim pages in pool_reclaim().

This hook requests the client to try and free some items back to
the pool.

From art@openbsd.org.


To generate a diff of this commit:
cvs rdiff -r1.67 -r1.68 syssrc/sys/kern/subr_pool.c
cvs rdiff -r1.30 -r1.31 syssrc/sys/sys/pool.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.