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_malloc_debug.c b/sys/kern/kern_malloc_debug.c
index 56a9319067d..582467d5de0 100644
--- a/sys/kern/kern_malloc_debug.c
+++ b/sys/kern/kern_malloc_debug.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_malloc_debug.c,v 1.15 2001/12/08 02:24:07 art Exp $	*/
+/*	$OpenBSD: kern_malloc_debug.c,v 1.16 2002/01/23 00:39:47 art Exp $	*/
 
 /*
  * Copyright (c) 1999, 2000 Artur Grabowski <art@openbsd.org>
@@ -216,7 +216,7 @@ debug_malloc_init(void)
 	debug_malloc_chunks_on_freelist = 0;
 
 	pool_init(&debug_malloc_pool, sizeof(struct debug_malloc_entry),
-	    0, 0, 0, "mdbepl", 0, NULL, NULL, 0);
+	    0, 0, 0, "mdbepl", NULL);
 }
 
 /*