Bug 5665

Summary:	CPU lockup when hitting OOM on amd64/NUMA
Product:	Memory Management	Reporter:	Michael Renner (robe)
Component:	Page Allocator	Assignee:	Andrew Morton (akpm)
Status:	REJECTED UNREPRODUCIBLE
Severity:	high	CC:	clameter, mrechberger, protasnb
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.15-rc2	Subsystem:
Regression:	---	Bisected commit-id:

Description Michael Renner 2005-11-26 22:43:36 UTC

Distribution: debian testing
Hardware Environment: iwill h8501, 8x dualcore opteron, 64gb ram
Problem Description: triggering OOM events under certain workloads causes lockups.

Steps to reproduce: I was able to reproducible trigger this bug by having
multiple processess (4-16) with large memory footprints grow until they
eventually reach the systems memory limit.

Here's a "screenshot" of a trace in 2.6.15-rc2 w/o swapspace:
http://666kb.com/i/10yom358azw8w.jpg
And here's one with a swapfile: http://666kb.com/i/10z1l2c61a8ld.jpg
Used .config: http://phpfi.com/88965

Comment 1 Natalie Protasevich 2007-10-29 10:48:44 UTC

Michael, is this still a problem with recent kernels?
Thanks.

Comment 2 Michael Renner 2007-11-04 17:28:19 UTC

I can't tell because I don't work with the systems in question anymore. The BUG() output looked pretty conclusive, but feel free to close this bug.

Comment 3 Natalie Protasevich 2008-03-10 23:52:27 UTC

I am pretty sure that the kernel is too old. It's been so many updates to page allocation/reclamation/throttling mechanism, the problem really needs to be confirmed. But I better let developers to decide.