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[Xen-devel] Post 2.6.21 pv-ops kernels hang Nahelem systems when domU is started - BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]

To: xen-devel@xxxxxxxxxxxxxxxxxxx

From: Bruce Edge <bruce.edge@xxxxxxxxx>

Date: Thu, 30 Sep 2010 07:31:33 -0700

Delivery-date: Thu, 30 Sep 2010 07:33:07 -0700

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I didn't report this earlier as I thought it must have been my fault as I pruned out a lot of modules from the pvops kernel. With the .23 release and the same behavior with the same config that was working with 2.6.32.18, I felt I needed to report this now as I don't think it's my fault anymore. The dom0 boot's OK, bu hangs as soon as a pvops domU is started. The HVM domU is OK. On the domU I get: ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ â dpm-domu 6.0.15-01, with Linux 2.6.32.23-3-rollback-to-18-config â â Memory test (memtest86+) â â Memory test (memtest86+, serial console 115200) â â â â â â â â â â â ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ Use the ^ and v keys to select which entry is highlighted. Press enter to boot the selected OS, 'e' to edit the commands before booting, 'a' to modify the kernel arguments before booting, or 'c' for a command line. Started domain dpm (id=1) The Dom0 console shows: (XEN) tmem: all pools frozen for all domains (XEN) tmem: all pools thawed for all domains (XEN) tmem: all pools frozen for all domains (XEN) tmem: all pools thawed for all domains mapping kernel into physical memory about to get started... <one minute passes...> [46287.941296] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0] [46353.441235] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0] one more of these every 60 sec. [46418.941235] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0] This is consistent with xen 4.1 and 4.0.2rc1pre Kernel config and boot log attached. -Bruce

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