• Keith Owens's avatar
    [PATCH] x86_64: Avoid broadcasting NMI IPIs · e77deacb
    Keith Owens authored
    On some i386/x86_64 systems, sending an NMI IPI as a broadcast will
    reset the system.  This seems to be a BIOS bug which affects machines
    where one or more cpus are not under OS control.  It occurs on HT
    systems with a version of the OS that is not compiled without HT
    support.  It also occurs when a system is booted with max_cpus=n where
    2 <= n < cpus known to the BIOS.  The fix is to always send NMI IPI as
    a mask instead of as a broadcast.
    Signed-off-by: default avatarKeith Owens <kaos@sgi.com>
    Signed-off-by: default avatarAndi Kleen <ak@suse.de>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    e77deacb
mach_ipi.h 1.2 KB