dc6fbf6545
has proven to have a good effect when entering KDB by using a NMI, but it completely violates all the good rules about interrupts disabled while holding a spinlock in other occasions. This can be the cause of deadlocks on events where a normal IPI_STOP is expected. * Adds an new IPI called IPI_STOP_HARD on all the supported architectures. This IPI is responsible for sending a stop message among CPUs using a privileged channel when disponible. In other cases it just does match a normal IPI_STOP. Right now the IPI_STOP_HARD functionality uses a NMI on ia32 and amd64 architectures, while on the other has a normal IPI_STOP effect. It is responsibility of maintainers to eventually implement an hard stop when necessary and possible. * Use the new IPI facility in order to implement a new userend SMP kernel function called stop_cpus_hard(). That is specular to stop_cpu() but it does use the privileged channel for the stopping facility. * Let KDB use the newly introduced function stop_cpus_hard() and leave stop_cpus() for all the other cases * Disable interrupts on CPU0 when starting the process of APs suspension. * Style cleanup and comments adding This patch should fix the reboot/shutdown deadlocks many users are constantly reporting on mailing lists. Please don't forget to update your config file with the STOP_NMI option removal Reviewed by: jhb Tested by: pho, bz, rink Approved by: re (kib) |
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|---|---|---|
| .. | ||
| pc | ||
| _bus.h | ||
| _inttypes.h | ||
| _limits.h | ||
| _regset.h | ||
| _stdint.h | ||
| _types.h | ||
| acpica_machdep.h | ||
| asm.h | ||
| atomic.h | ||
| bootinfo.h | ||
| bus_dma.h | ||
| bus.h | ||
| clock.h | ||
| cpu.h | ||
| cpufunc.h | ||
| db_machdep.h | ||
| dig64.h | ||
| efi.h | ||
| elf.h | ||
| endian.h | ||
| exec.h | ||
| float.h | ||
| floatingpoint.h | ||
| fpu.h | ||
| frame.h | ||
| gdb_machdep.h | ||
| ia64_cpu.h | ||
| ieee.h | ||
| ieeefp.h | ||
| in_cksum.h | ||
| intr.h | ||
| intrcnt.h | ||
| kdb.h | ||
| limits.h | ||
| mca.h | ||
| md_var.h | ||
| memdev.h | ||
| mutex.h | ||
| nexusvar.h | ||
| pal.h | ||
| param.h | ||
| pcb.h | ||
| pci_cfgreg.h | ||
| pcpu.h | ||
| pmap.h | ||
| pmc_mdep.h | ||
| proc.h | ||
| profile.h | ||
| pte.h | ||
| ptrace.h | ||
| reg.h | ||
| reloc.h | ||
| resource.h | ||
| runq.h | ||
| sal.h | ||
| sapicreg.h | ||
| sapicvar.h | ||
| setjmp.h | ||
| sf_buf.h | ||
| sigframe.h | ||
| signal.h | ||
| smp.h | ||
| stdarg.h | ||
| sysarch.h | ||
| ucontext.h | ||
| unwind.h | ||
| varargs.h | ||
| vm.h | ||
| vmparam.h | ||