Re: edac driver injection of uncorrected errors & utils

[Tracy Smith <tlsmith3777@gmail.com>]

Thanks York. Why will injecting multi-bit errors crash linux?  Is this
the case only for layerscape?  Is there a way to harden against this?

On Wed, Nov 28, 2018 at 1:06 PM York Sun <york.sun@nxp.com> wrote:
>
> Tracy,
>
> You can inject multiple-bit errors. You will crash the system for doing
> that. I can't comment on edac-util.
>
> York
>
>
> On 11/28/18 12:49 PM, Tracy Smith wrote:
> > Can I inject a uncorrected error or only corrected errors using the
> > layerscape edac driver injection via sysfs?
> >
> > Is this the expected output for the edac-util on layerscape when
> > injecting errors?
> >
> > root@ls1043ardb:~# edac-util -v
> > mc0: 0 Uncorrected Errors with no DIMM info
> > mc0: 0 Corrected Errors with no DIMM info
> > mc0: csrow0: 0 Uncorrected Errors
> > mc0: csrow0: mc#0csrow#0channel#0: 643 Corrected Errors
> >
> > root@ls1043ardb:~# edac-util -vs
> > edac-util: EDAC drivers are loaded. 1 MC detected:
> > mc0:fsl_mc_err
> >
> > root@ls1043ardb:~# edac-util
> > mc0: csrow0: mc#0csrow#0channel#0: 2700 Corrected Errors
> >
> > Does edac-ctl function on ARM based platforms or only on x86 and why
> > might it show 0MB for the memory layout for DDR4 as below?
> >
> > /run/media/nvme0n1p1/tls/neo_mcu-kernel/drivers/edac-utils# edac-ctl
> > --layoutreadline() on closed filehandle IN at /usr/sbin/edac-ctl line
> > 514.
> > Use of uninitialized value $size in sprintf at /usr/sbin/edac-ctl line 533.
> > Use of uninitialized value $size in sprintf at /usr/sbin/edac-ctl line 533.
> > Use of uninitialized value $size in sprintf at /usr/sbin/edac-ctl line 533.
> > Use of uninitialized value $size in sprintf at /usr/sbin/edac-ctl line 533.
> >           +-----------------------------------------------+
> >           |                      mc0                      |
> >           |  csrow0   |  csrow1   |  csrow2   |  csrow3   |
> > ----------+-----------------------------------------------+
> > channel0: |     0 MB  |     0 MB  |     0 MB  |     0 MB  |
> > ----------+-----------------------------------------------+
> >
>


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