> From: Alexandru Chirvasitu [mailto:achirvasub@xxxxxxxxx] > Sent: Friday, December 22, 2017 14:29 > > The output of that precise command run just now on a freshly-compiled > copy of that commit is attached. > > On Fri, Dec 22, 2017 at 09:31:28PM +0000, Dexuan Cui wrote: > > > From: Alexandru Chirvasitu [mailto:achirvasub@xxxxxxxxx] > > > Sent: Friday, December 22, 2017 06:21 > > > > > > In the absence of logs, the best I can do at the moment is attach a > > > picture of the screen I am presented with on the apic=debug boot > > > attempt. > > > Alex > > > > The panic happens in irq_matrix_assign_system+0x4e/0xd0 in your picture. > > IMO we should find which line of code causes the panic. I suppose > > "objdump -D kernel/irq/matrix.o" can help to do that. > > > > Thanks, > > -- Dexuan The BUG_ON panic happens at line 147: BUG_ON(!test_and_clear_bit(bit, cm->alloc_map)); I'm sure Thomas and Dou know it better than me. 137 void irq_matrix_assign_system(struct irq_matrix *m, unsigned int bit, 138 bool replace) 139 { 140 struct cpumap *cm = this_cpu_ptr(m->maps); 141 142 BUG_ON(bit > m->matrix_bits); 143 BUG_ON(m->online_maps > 1 || (m->online_maps && !replace)); 144 145 set_bit(bit, m->system_map); 146 if (replace) { 147 BUG_ON(!test_and_clear_bit(bit, cm->alloc_map)); 148 cm->allocated--; 149 m->total_allocated--; 150 } 151 if (bit >= m->alloc_start && bit < m->alloc_end) 152 m->systembits_inalloc++; 153 154 trace_irq_matrix_assign_system(bit, m); 155 } -- Dexuan _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
