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From: Gavin Hemphill <hemphill@drea.dnd.ca>
To: linuxppc-dev@lists.linuxppc.org
Subject: mprotect and SMP
Date: Wed, 06 Dec 2000 12:08:37 -0400	[thread overview]
Message-ID: <3A2E643E.6EBA2012@drea.dnd.ca> (raw)


Hi all:
I'm running a multi-threaded application on an SMP Gemini board
(2.2.18-pre11) which uses the mprotect call to lock pages between the
threads.  If I run the test program on this machine in SMP mode, it
fails (threads tromp on their shared memory locations).  If I run in
uni-processor mode however it works fine.  It also works fine on a dual
processor pentium using a similar version of the kernel.  The question
is... Has anyone seen this sort of behavior and are there any suggested
places to start looking to fix it?  I took a look at the gemini specific
files to see if there were any obvious missing eieio or sync
instructions and so far haven't seen any, but I don't have the
experience to know where else I should be looking.
	Gavin


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

             reply	other threads:[~2000-12-06 16:08 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-12-06 16:08 Gavin Hemphill [this message]
2000-12-06 21:52 ` mprotect and SMP Benjamin Herrenschmidt
2000-12-07 12:29   ` Gavin Hemphill
2000-12-07 13:15     ` Benjamin Herrenschmidt
2001-01-03  1:35       ` Gavin Hemphill
2000-12-07 17:16   ` Gavin Hemphill

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