thoughts on system hangs after panic()
Don Lewis
truckman at FreeBSD.org
Mon Aug 16 21:43:29 PDT 2004
I suspect the cause of the system hangs after a panic that are keeping
crash dumps from working is one of the shutdown_pre_sync handlers
getting wedged. The most likely culprit is syncer_shutdown(), but I
think any of the handlers could get wedged in kthread_suspend().
Either we should skip shutdown_pre_sync entirely if RB_NOSYNC is set, or
the handlers should obey this bit as appropriate. The latter would
require a little more code to be touched, but would allow for more
flexibility.
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