Pool deals fairly well with physical memory shortage, but it doesn't deal

well (not at all) with shortages of the vm_map where the pages are mapped
(usually kmem_map).

Try to deal with it:
 - group all information the backend allocator for a pool in a separate
   struct. The pool will only have a pointer to that struct.
 - change the pool_init API to reflect that.
 - link all pools allocating from the same allocator on a linked list.
 - Since an allocator is responsible to wait for physical memory it will
   only fail (waitok) when it runs out of its backing vm_map, carefully
   drain pools using the same allocator so that va space is freed.
   (see comments in code for caveats and details).
 - change pool_reclaim to return if it actually succeeded to free some
   memory, use that information to make draining easier and more efficient.
 - get rid of PR_URGENT, noone uses it.

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/kern/kern_proc.c b/sys/kern/kern_proc.c
index e8fdc6b4084..3725838dfa0 100644
--- a/sys/kern/kern_proc.c
+++ b/sys/kern/kern_proc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_proc.c,v 1.9 2002/01/16 20:50:17 miod Exp $	*/
+/*	$OpenBSD: kern_proc.c,v 1.10 2002/01/23 00:39:47 art Exp $	*/
 /*	$NetBSD: kern_proc.c,v 1.14 1996/02/09 18:59:41 christos Exp $	*/
 
 /*
@@ -110,7 +110,7 @@ procinit()
 	uihashtbl = hashinit(maxproc / 16, M_PROC, M_WAITOK, &uihash);
 
 	pool_init(&proc_pool, sizeof(struct proc), 0, 0, 0, "procpl",
-		0, pool_page_alloc_nointr, pool_page_free_nointr, M_PROC);
+		&pool_allocator_nointr);
 }
 
 /*