# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 1597340245 25200
# Node ID 26eb62bd0550396f4192b1a63dc96088ffc4bc58
# Parent  8c466bcb087960e126ca699b59337e6cf5c30fe6
posixworker: avoid creating workers that end up getting no work

If `workers` (the detected or configured number of CPUs) is greater
than the number of work items, then some of the workers end up getting
0 work items. Let's not create such workers.

Differential Revision: https://phab.mercurial-scm.org/D8927

diff -r 8c466bcb0879 -r 26eb62bd0550 mercurial/worker.py
--- a/mercurial/worker.py	Mon Aug 10 21:46:47 2020 -0700
+++ b/mercurial/worker.py	Thu Aug 13 10:37:25 2020 -0700
@@ -211,7 +211,7 @@
     parentpid = os.getpid()
     pipes = []
     retval = {}
-    for pargs in partition(args, workers):
+    for pargs in partition(args, min(workers, len(args))):
         # Every worker gets its own pipe to send results on, so we don't have to
         # implement atomic writes larger than PIPE_BUF. Each forked process has
         # its own pipe's descriptors in the local variables, and the parent