Tracy, This DDR controller doesn't have the capability to inject limited errors. As soon as you enable the error injection, all memory transactions will carry the error. Since multi-bit errors are not correctable. I don't expect Linux to work properly with these errors. York On 11/28/18 1:11 PM, Tracy Smith wrote: > 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@xxxxxxx> 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 | >>> ----------+-----------------------------------------------+ >>> >> > > > -- > Confidentiality notice: This e-mail message, including any > attachments, may contain legally privileged and/or confidential > information. If you are not the intended recipient(s), please > immediately notify the sender and delete this e-mail message. >
