getty takes 100% CPU

circus78 · 03-04-2017, 01:46 PM

Hi,
I am using Ubuntu Server 12.04 LTS (I know, it's in EOL).

I noticed that I have 4 getty processes with 100% CPU.

Code:

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 1169 root      20   0 15784  788  760 R  101  0.0  20996,33 getty
 1185 root      20   0 15784  784  760 R  101  0.0  20996,36 getty

is it a bug?
I always connect to this server through SSH, anyway
Thank you

circus78 · 03-04-2017, 01:49 PM

further details (strace output)

open("/etc/issue", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=26, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa23d9ba000
read(3, "Ubuntu 12.04.5 LTS \\n \\l\n\n", 4096) = 26
write(1, "U", 1) = -1 EIO (Input/output error)
write(1, "b", 1) = -1 EIO (Input/output error)
write(1, "u", 1) = -1 EIO (Input/output error)
write(1, "n", 1) = -1 EIO (Input/output error)
write(1, "t", 1) = -1 EIO (Input/output error)
write(1, "u", 1) = -1 EIO (Input/output error)
write(1, " ", 1) = -1 EIO (Input/output error)
write(1, "1", 1) = -1 EIO (Input/output error)
write(1, "2", 1) = -1 EIO (Input/output error)
write(1, ".", 1) = -1 EIO (Input/output error)
write(1, "0", 1) = -1 EIO (Input/output error)
write(1, "4", 1) = -1 EIO (Input/output error)
write(1, ".", 1) = -1 EIO (Input/output error)
write(1, "5", 1) = -1 EIO (Input/output error)
write(1, " ", 1) = -1 EIO (Input/output error)
write(1, "L", 1) = -1 EIO (Input/output error)
write(1, "T", 1) = -1 EIO (Input/output error)
write(1, "S", 1) = -1 EIO (Input/output error)
write(1, " ", 1) = -1 EIO (Input/output error)