From c264a24a38188a2f8bd3e7a591490bb2cfddea26 Mon Sep 17 00:00:00 2001 From: Peter Stephenson Date: Fri, 7 Dec 2007 14:07:50 +0000 Subject: unposted: add explanatory comment for blocking around fork() --- ChangeLog | 2 ++ Src/exec.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/ChangeLog b/ChangeLog index 9d9d15aa4..b52da96cd 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,7 @@ 2007-12-07 Peter Stephenson + * Unposted: Src/exec.c: add explanatory comment for 24170/24179. + * 24180: configure.ac, Src/utils.c: back off (most of) 24148. * 24179: Src/exec.c: alter 241770 to use queue_signals(). 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(); -- cgit 1.4.1