On (20/07/09 15:14), kernel test robot wrote: [..] Took me a while to find the FAIL-ed test: > kmsg01.c:393: INFO: TEST: read returns EPIPE when messages get overwritten > kmsg01.c:398: INFO: first seqno: 0 > kmsg01.c:411: INFO: first seqno now: 881 > kmsg01.c:425: FAIL: read returned: 77: SUCCESS (0) So this is seq number related https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/logging/kmsg/kmsg01.c#L383 LTP writes a gazillion (roughly, maybe a bit less than that) filler messages to /dev/kmsg in order to cause logbuf overlap: ... 19490 [ 172.301584] LTP kmsg01 FILLER MESSAGE TO OVERWRITE OTHERS 19491 [ 172.308730] LTP kmsg01 FILLER MESSAGE TO OVERWRITE OTHERS 19492 [ 172.313852] LTP kmsg01 FILLER MESSAGE TO OVERWRITE OTHERS 19493 [ 172.320988] LTP kmsg01 FILLER MESSAGE TO OVERWRITE OTHERS 19494 [ 172.325618] LTP kmsg01 FILLER MESSAGE TO OVERWRITE OTHERS ... -ss _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
