Date: Mon, 15 Jun 2009 15:29:23 +0400 From: pluknet <pluknet@gmail.com> To: freebsd-stable <freebsd-stable@freebsd.org> Subject: coretemp(4) lockups on 6-stable Message-ID: <a31046fc0906150429k311e74f4paed3390488b7ebe2@mail.gmail.com>
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This is 6.4-stable from April. System locks up while in `sysctl dev.cpu` (with coretemp kldloaded). So as far as I understand sched_bind() binds an executing thread to nonexistent CPU 255. Same behavior on coretemp built on 6.2. db> ps pid ppid pgrp uid state wmesg wchan cmd 34381 34380 34381 0 R+ CPU 255 sysctl [...] db> bt 34381 Tracing pid 34381 tid 100166 td 0xc8634680 sched_switch(c8634680,0,1) at sched_switch+0x143 mi_switch(1,0,c86347e0,4,c0a4e510,...) at mi_switch+0x1ba sched_bind(c8634680,4,c856f3b0,0,c0836b3b,...) at sched_bind+0x52 coretemp_get_temp_sysctl(c8ef56c0,c908c200,0,eebebc04,c8ef56c0,...) at coretemp_get_temp_sysctl+0x47 sysctl_root(0,eebebc74,4,eebebc04) at sysctl_root+0x107 userland_sysctl(c8634680,eebebc74,4,0,bfbfda8c,0,0,0,eebebc70,0) at userland_sysctl+0x112 __sysctl(c8634680,eebebd04) at __sysctl+0x93 syscall(3b,3b,3b,4,bfbfda8c,...) at syscall+0x2bf Xint0x80_syscall() at Xint0x80_syscall+0x1f --- syscall (202, FreeBSD ELF32, __sysctl), eip = 0x2812407b, esp = 0xbfbfd9fc, ebp = 0xbfbfda38 --- static int coretemp_get_temp(device_t dev) { uint64_t msr; int temp; int cpu = device_get_unit(dev); struct coretemp_softc *sc = device_get_softc(dev); char stemp[16]; mtx_lock_spin(&sched_lock); sched_bind(curthread, cpu); ^^^ mtx_unlock_spin(&sched_lock); -- wbr, pluknet
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