Hi All, Some days ago we have a hardware update here. ;-) And now my working station has "Intel(R) Core(TM)i7 CPU 920 @ 2,67 GHz" CPU inside and looks like a machine with 8 CPUs. I tried to boot Haiku on this PC. In default case Haiku freezed at early stage - there was a boot logo, all boot icons were grayed and I have no possibility to open boot menu. It only possible to boot either with "SMP off" boot option or with some CPU cores switched off in BIOS. There were also some messages in the syslog about "maximal count of CPU(4) reached". Well, I quickly browse through the source and found the following define in headers/private/kernel/boot/platform/bios_ia32/platform_kernel_args.h 17 // must match SMP_MAX_CPUS in arch_smp.h 18 #define MAX_BOOT_CPUS 4 I have also found that headers/build/os/kernel/OS.h contains different define for count of CPUs 368 #if __INTEL__ 369 # define B_MAX_CPU_COUNT 8 370 #elif __POWERPC__ 371 # define B_MAX_CPU_COUNT 8 372 #endif I have increased MAX_BOOT_CPUS to 8 and completely rebuild the Haiku installation. This version of Haiku goes to boot until the last (the "Rocket") icon and freeze without go to blue desktop. After that I have activated on-screen debugging and saw that all stopped with log message "Not possible to start debugger. The message: "tid < MAX HEAPS". I think the following assert was occured but was not handled: src/system/libroot/posix/malloc/processheap.h: 188 int 189 processHeap::getHeapIndex(void) 190 { 191 // Here we use the number of processors as the maximum number of heaps. 192 // In fact, for efficiency, we just round up to the highest power of two, 193 // times two. 194 int tid = find_thread(NULL) & _numProcessorsMask; 195 assert(tid < MAX_HEAPS); 196 return tid; 197 } And now I need some more suggestions from you how to debug this situation and let Haiku boot with 8 CPUs. ;-) Thank you! -- Kind Regards, S.Zharski