Messages in this thread | | | Date | Tue, 10 Jun 2003 10:34:31 -0700 | From | "Martin J. Bligh" <> | Subject | Re: 2.5.70 (virgin) hangs running SDET |
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>> The ps instance which is spinning on kernel_flag in proc_root_lookup is >> what's holding things up. >> >> Or is it spinning in proc_lookup() or proc_pid_lookup()? I have a vague >> feeling that I've seen these traces miss out the innermost stack slot... >> >> Suggest: >> >> a) Use CONFIG_SPINLINE, get a new sysrq-T trace >> >> b) Enable spinlock debugging >> >> c) Try disabling the sched_balance_exec() code. > > > Moving that locking around as discussed last night didn't fix it. > It did last 2.5 cycles of repeated SDET this time instead of 0.5, > but that might just be coincidence, as the hang looks the same. Got > a better backtrace out of her this time though .... > > Want me to back out the patch I was pointing fingers at? Or I can > carry on with the path you suggested above if you think it'll help ...
OK, well backing out dcache_lock-vs-tasklist_lock-take-3.patch does indeed seem to fix the problem. It's done 5.5 whole cycles now, and still going strong.
M.
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