every so often, I'm seeing these in my dmesg output, and I'm not sure what they are?
host[32625]: segfault at 0 ip 000000000040abb8 sp 00007ff59d36bd40 error 4 in host[400000+1b000] host[24560]: segfault at 0 ip 000000000040abb8 sp 00007f4fa1c4bd40 error 4 in host[400000+1b000] host[8354]: segfault at 0 ip 000000000040abb8 sp 00007fa07330dd40 error 4 in host[400000+1b000]
in situ, the tail of dmesg looks like...
md: data-check of RAID array md0 md: minimum _guaranteed_ speed: 1000 KB/sec/disk. md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check. md: using 128k window, over a total of 1953383232k. md: md0: data-check done. host[8758]: segfault at 0 ip 000000000040abb8 sp 00007f9b7914ed40 error 4 in host[400000+1b000] host[15122]: segfault at 0 ip 000000000040abb8 sp 00007f63edccad40 error 4 in host[400000+1b000] UDP: bad checksum. From 71.6.167.142:40000 to 207.111.214.246:44818 ulen 32 md: data-check of RAID array md0 md: minimum _guaranteed_ speed: 1000 KB/sec/disk. md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check. md: using 128k window, over a total of 1953383232k. md: md0: data-check done. host[32625]: segfault at 0 ip 000000000040abb8 sp 00007ff59d36bd40 error 4 in host[400000+1b000] host[24560]: segfault at 0 ip 000000000040abb8 sp 00007f4fa1c4bd40 error 4 in host[400000+1b000] host[8354]: segfault at 0 ip 000000000040abb8 sp 00007fa07330dd40 error 4 in host[400000+1b000] md: data-check of RAID array md0 md: minimum _guaranteed_ speed: 1000 KB/sec/disk. md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check. md: using 128k window, over a total of 1953383232k. md: md0: data-check done.
On 9/21/2014 12:50, John R Pierce wrote:
every so often, I'm seeing these in my dmesg output, and I'm not sure what they are?
host[32625]: segfault at 0 ip 000000000040abb8 sp 00007ff59d36bd40 error 4 in host[400000+1b000] host[24560]: segfault at 0 ip 000000000040abb8 sp 00007f4fa1c4bd40 error 4 in host[400000+1b000] host[8354]: segfault at 0 ip 000000000040abb8 sp 00007fa07330dd40 error 4 in host[400000+1b000]
Normally the "in $foo" bit at the end names a program or library. I wonder if the host[$foo+$bar] syntax revers to a KVM guest?
It's odd that it's correlated in time with some automatic software RAID check you've got going there. Is the order segfault-then-md as a closely-spaced pair, followed by a gap in time?
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John R Pierce -
Warren Young