• Kurt Garloff's avatar
    x86: Add sysctl to allow panic on IOCK NMI error · 5211a242
    Kurt Garloff authored
    This patch introduces a new sysctl:
    
        /proc/sys/kernel/panic_on_io_nmi
    
    which defaults to 0 (off).
    
    When enabled, the kernel panics when the kernel receives an NMI
    caused by an IO error.
    
    The IO error triggered NMI indicates a serious system
    condition, which could result in IO data corruption. Rather
    than contiuing, panicing and dumping might be a better choice,
    so one can figure out what's causing the IO error.
    
    This could be especially important to companies running IO
    intensive applications where corruption must be avoided, e.g. a
    bank's databases.
    
    [ SuSE has been shipping it for a while, it was done at the
      request of a large database vendor, for their users. ]
    Signed-off-by: default avatarKurt Garloff <garloff@suse.de>
    Signed-off-by: default avatarRoberto Angelino <robertangelino@gmail.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    Cc: "Eric W. Biederman" <ebiederm@xmission.com>
    LKML-Reference: <20090624213211.GA11291@kroah.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    5211a242
dumpstack.c 7.88 KB