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authorDavid Wilder <dwilder@us.ibm.com>2006-06-29 15:17:30 -0700
committerPaul Mackerras <paulus@samba.org>2006-08-17 16:41:10 +1000
commiteac8392f9591b359847b8a6abb75ca60967bcecd (patch)
treeb4f834392fe4021bbace3c0f58ad01581cfd844e /net/x25
parent81b73dd92b97423b8f5324a59044da478c04f4c4 (diff)
[POWERPC] Make secondary CPUs call into kdump on reset exception
In the case of a system hang, the user will invoke soft-reset to initiate the kdump boot. If xmon is enabled, the CPU(s) enter into the xmon debugger. Unfortunately, the secondary CPU(s) will return to the hung state when they exit from the debugger (returned from die() -> system_reset_exception()). This causes a problem in kdump since the hung CPU(s) will not respond to the IPI sent from kdump. This patch fixes the issue by calling crash_kexec_secondary() directly from system_reset_exception() without returning to the previous state. These secondary CPUs wait 5ms until the kdump boot is started by the primary CPU. In the case we exited from the debugger to "recover" (command 'x' in xmon) the primary and the secondary CPUs will all return from die() -> system_reset_exception() ->crash_kexec_secondary() wait 5ms, then return to the previous state. A kdump boot is not started in this case. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: David Wilder <dwilder@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'net/x25')
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