[PATCH net-next v4 1/3] vmcore: add API to collect hardware dump in second kernel
rahul.lakkireddy at chelsio.com
Thu Apr 19 07:56:06 PDT 2018
On Thursday, April 04/19/18, 2018 at 13:54:56 +0530, Greg KH wrote:
> On Tue, Apr 17, 2018 at 01:14:17PM +0530, Rahul Lakkireddy wrote:
> > +config PROC_VMCORE_DEVICE_DUMP
> > + bool "Device Hardware/Firmware Log Collection"
> > + depends on PROC_VMCORE
> > + default y
> Only things that require the machine to keep working should be 'default
> y', please remove this, it's an option.
Ok. Will fix this.
> > + help
> > + Device drivers can collect the device specific snapshot of
> > + their hardware or firmware before they are initialized in
> > + crash recovery kernel. If you say Y here, the device dumps
> > + will be added as ELF notes to /proc/vmcore
> Which exact "device drivers" are you referring to here?
The API is generic enough to collect any type of device's dump. Any
driver that wants to collect its underlying hardware/firmware dump
can use the API. In our case, cxgb4 driver collects dumps of the
underlying Chelsio network devices.
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