be1057174e
* Completely remove the option STOP_NMI from the kernel. This option 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. * Add 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)
61 lines
1.3 KiB
Plaintext
61 lines
1.3 KiB
Plaintext
# $FreeBSD$
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# Options specific to AMD64 platform kernels
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AUTO_EOI_1 opt_auto_eoi.h
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AUTO_EOI_2 opt_auto_eoi.h
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MAXMEM
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PERFMON
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PMAP_SHPGPERPROC opt_pmap.h
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MP_WATCHDOG
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# Options for emulators. These should only be used at config time, so
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# they are handled like options for static filesystems
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# (see src/sys/conf/options), except for broken debugging options.
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COMPAT_IA32 opt_compat.h
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#IBCS2 opt_dontuse.h
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#COMPAT_LINUX opt_dontuse.h
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COMPAT_LINUX32 opt_compat.h
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#COMPAT_SVR4 opt_dontuse.h
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#DEBUG_SVR4 opt_svr4.h
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LINPROCFS opt_dontuse.h
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LINSYSFS opt_dontuse.h
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NDISAPI opt_dontuse.h
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TIMER_FREQ opt_clock.h
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# options for serial support
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COM_ESP opt_sio.h
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COM_MULTIPORT opt_sio.h
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CONSPEED opt_sio.h
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GDBSPEED opt_sio.h
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COM_NO_ACPI opt_sio.h
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VGA_ALT_SEQACCESS opt_vga.h
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VGA_DEBUG opt_vga.h
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VGA_NO_FONT_LOADING opt_vga.h
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VGA_NO_MODE_CHANGE opt_vga.h
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VGA_SLOW_IOACCESS opt_vga.h
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VGA_WIDTH90 opt_vga.h
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# AGP debugging support
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AGP_DEBUG opt_agp.h
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ATKBD_DFLT_KEYMAP opt_atkbd.h
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# -------------------------------
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# EOF
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# -------------------------------
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HAMMER opt_cpu.h
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PSM_HOOKRESUME opt_psm.h
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PSM_RESETAFTERSUSPEND opt_psm.h
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PSM_DEBUG opt_psm.h
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DEV_ATPIC opt_atpic.h
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# Debugging
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KDTRACE_FRAME opt_kdtrace.h
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# BPF just-in-time compiler
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BPF_JITTER opt_bpf.h
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XENHVM opt_global.h
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