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authorPeter Stephenson <pws@users.sourceforge.net>2007-12-07 14:07:50 +0000
committerPeter Stephenson <pws@users.sourceforge.net>2007-12-07 14:07:50 +0000
commitc264a24a38188a2f8bd3e7a591490bb2cfddea26 (patch)
tree4a62c735390dada8d6d2a8c8f781853cb1bb30d6 /Src/exec.c
parentcefc0d927f11f9749c082d58d65c3e9ac007e8a1 (diff)
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unposted: add explanatory comment for blocking around fork()
Diffstat (limited to 'Src/exec.c')
-rw-r--r--Src/exec.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/Src/exec.c b/Src/exec.c
index 9695011e3..3c13da476 100644
--- a/Src/exec.c
+++ b/Src/exec.c
@@ -239,6 +239,12 @@ zfork(struct timeval *tv)
     }
     if (tv)
 	gettimeofday(tv, &dummy_tz);
+    /*
+     * Queueing signals is necessary on Linux because fork()
+     * manipulates mutexes, leading to deadlock in memory
+     * allocation.  We don't expect fork() to be particularly
+     * zippy anyway.
+     */
     queue_signals();
     pid = fork();
     unqueue_signals();