# HG changeset patch
# User Allan Saddi <allan@saddi.com>
# Date 1250538163 25200
# Node ID 6ea1ffac1bcb8753a0909d598bddf3486f45dbdc
# Parent  e0e7e885f6cc57731cc456caec1f294405f2e006
Restore check of the absolute number of children against maxSpare and
document rationale.

diff -r e0e7e885f6cc -r 6ea1ffac1bcb flup/server/preforkserver.py
--- a/flup/server/preforkserver.py	Mon Aug 17 13:46:42 2009 -0500
+++ b/flup/server/preforkserver.py	Mon Aug 17 12:42:43 2009 -0700
@@ -126,8 +126,12 @@
         
         # Main loop.
         while self._keepGoing:
-            # Maintain minimum number of children.
-            while len(self._children) < self._minSpare:
+            # Maintain minimum number of children. Note that we are checking
+            # the absolute number of children, not the number of "available"
+            # children. We explicitly test against _maxSpare to maintain
+            # an *optimistic* absolute minimum. The number of children will
+            # always be in the range [_maxSpare, _maxChildren].
+            while len(self._children) < self._maxSpare:
                 if not self._spawnChild(sock): break
 
             # Wait on any socket activity from live children.