Quoting David Xu <davi...@freebsd.org> (from Mon, 8 Feb 2010 07:31:05
+0000 (UTC)):
Author: davidxu
Date: Mon Feb 8 07:31:05 2010
New Revision: 203657
URL: http://svn.freebsd.org/changeset/base/203657
Log:
Set waiters flag before checking semaphore's counter,
otherwise we might lose a wakeup. Tested on postgresql database server.
Uhm... if I ktrace a hanging process and I see some semop()s (I assume
it is waiting on some event to happen), where on Linux this process is
working correctly, then I would like to test this patch to see if the
process still has the same problem?
Or differently asked: this affects the operation of semop(2)?
Bye,
Alexander.
--
We only acknowledge small faults in order
to make it appear that we are free from great ones.
-- LaRouchefoucauld
http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137
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