Red Hat Bugzilla – Bug 35824
Enterprise kernel hangs system with 8GB of memory (seawolf)
Last modified: 2005-10-31 17:00:50 EST
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User-Agent: Mozilla/4.75 [en] (X11; U; Linux 2.4.2-0.1.32 i686)
When running Cerberus tests on an 8-way with 8gb of memory, system hangs
within 10 minutes of start of testing with enterprise kernel. System has
16gb of swap.
Steps to Reproduce:
3. wait 10 minutes
Only "magic" sysrq key works. I will attach a ksymoops output.
Created attachment 15264 [details]
ksymoops from magic sysreq dump
This is a deadlock involving zone pressure when dealing with bounce buffers.
It will only occur with the enterprise kernel, and then only on machines
containing memory with physical addresses above 4GB. We are investigating.
The amount of time it takes to reproduce this is variable. It happens only
under a combination of extreme IO load and extreme memory pressure.
Since this is a sev-1 bug with the gold CDs, can we move this out of the beta
team to public?
Resolved in SBE kernel 2.4.3-6, therefore also in errata kernel 2.4.3-12.