Messages in this thread | | | Subject | Re: 2.6.8.1-mm4 - more cpu hotplug breakage | From | Nathan Lynch <> | Date | Wed, 25 Aug 2004 18:09:00 -0500 |
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On Mon, 2004-08-23 at 17:18, Nathan Lynch wrote: > Hi- > > In both 2.6.8.1-mm3 and -mm4, a task which tries to offline a cpu > becomes permanently hung, seemingly because the high-priority per-cpu > kernel threads which __stop_machine_run starts never get to run. I did > a bisection search on the 2.6.8.1-mm4 patch series and narrowed it down > to one of these three patches, listed below along with their behavior > when trying to offline a cpu: > > 191: sched-smt-fixes.patch - panic > 192: sched-smt-fixes-fix.patch - panic > 193: nicksched.patch - process hangs
My apologies if this is getting annoying, but it occurred to me that any user of stop_machine_run is broken similarly... which means that unloading a module will also hang your machine. I have verified this on 2.6.8.1-mm4 on ppc64.
Nathan
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