Keith,

The workaround for [4709] which works well for us here is to use - mmap. Though, from your backtrace below I suspect that you have another problem.

Adrian

BTW, cc-ed to vm-dev list.

On Mar 20, 2007, at 15:59 , Keith Hodges wrote:

Another data point on the frozen images:

#uname -a

Linux Knoppix 2.6.19 #7 SMP PREEMPT Sun Dec 17 22:01:07 CET 2006 i686 GNU/Linux

My frozen image give me this backtrace:

(gdb) backtrace #0 0xb7e5d8e5 in nanosleep () from /lib/libc.so.6 #1 0x08070b58 in aioSleep (microSeconds=-1080448704) at /home/ piumarta/squeak/platforms/unix/vm/aio.c:281 #2 0xb7f50466 in display_ioRelinquishProcessorForMicroseconds (microSeconds=1000) at /home/piumarta/squeak/platforms/unix/vm-display-X11/sqUnixX11.c: 2317 #3 0x0805921d in ioRelinquishProcessorForMicroseconds (us=-516) at / home/piumarta/squeak/platforms/unix/vm/sqUnixMain.c:471 #4 0x0805f334 in primitiveRelinquishProcessor () at /home/piumarta/ squeak/platforms/unix/src/vm/interp.c:17833 #5 0x0806dc25 in interpret () at /home/piumarta/squeak/platforms/ unix/src/vm/interp.c:7756 #6 0x0805aae2 in main (argc=2, argv=0xbf99bc94, envp=0xfffffdfc) at /home/piumarta/squeak/platforms/unix/vm/sqUnixMain.c:1388

...

On Feb 15, 2007, at 07:53 , Keith Hodges wrote:

...

I found that using vm 3.6-3 solved my instability freezing issues with 3.9

Interesting..

I thought your image freezing might be related to the VM bug reported here: http://bugs.impara.de/view.php?id=4709. However, some tests I did recently show that the bug does not depend on the VM version but on the Linux kernel version 2.6.

1 - Squeak 3.9-9 VM, Linux 2.6 BUG 2 - Squeak 3.6-3 VM, Linux 2.6 BUG 3 - Squeak 3.7b-5 VM, Linux 2.4 OK 4 - Squeak 3.9-9 VM, Linux 2.4 OK

I updated the Mantis report with more details.

John, I tried what you suggest in this mail http:// lists.squeakfoundation.org/pipermail/seaside/2006-September/ 008981.html. I attached the gc stats files to the Mantis report.

Keith, could you provide a gdb backtrace of a frozen image? Do you also see the problem when running with -mmap?

Cheers, Adrian

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