Messages in this thread | | | From | Balbir Singh <> | Date | Mon, 5 Mar 2018 08:29:09 +1100 | Subject | Re: [PATCH v2] xmon: Setup xmon debugger hooks when first break-point is set |
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On Mon, Mar 5, 2018 at 4:30 AM, Vaibhav Jain <vaibhav@linux.vnet.ibm.com> wrote: > Presently sysrq key for xmon('x') is registered during kernel init > irrespective of the value of kernel param 'xmon'. Thus xmon is enabled > even if 'xmon=off' is passed on the kernel command line. However this > doesn't enable the kernel debugger hooks needed for instruction or data > breakpoints. Thus when a break-point is hit with xmon=off a kernel oops > of the form below is reported: > > Oops: Exception in kernel mode, sig: 5 [#1] > < snip > > Trace/breakpoint trap > > To fix this the patch checks and enables debugger hooks when an > instruction or data break-point is set via xmon console. > > Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com> > --- Reviewed-by: Balbir Singh <bsingharora@gmail.com>
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