Date: Mon, 7 Jul 2008 11:30:39 -0700 From: "Murty, Ravi" <ravi.murty@intel.com> To: <freebsd-hackers@freebsd.org> Subject: Bug in calcru in he 6.2 and 6.3 kernels Message-ID: <AEBCFC23C0E40949B10BA2C224FC61B007A3253D@orsmsx416.amr.corp.intel.com>
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Hello everyone, =20 Finally found what my last problem was. We were running top in a loop and running some workloads that called sched_bind() to bind threads to specific CPUs. The problem was that (and I am using ULE) sched_bind calls a function to notify another CPU of a thread and then mi_switches out of it. Since mi_switch sets the "oncpu" field of the thread to NOCPU and given the thread is still running, calcru would come in and assert the fact that "If I am running I better no be on NOCPU".. It appears that in other parts of the kernel (e.g. forward_signal) this is acceptable (i.e. it is okay to be running and oncpu is NOCPU).=20 =20 Thanks Ravi =20
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