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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1226172

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1226172

Title:
  iostat: Cannot open /proc/stat: Cannot allocate memory

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I receive an intermittent error using iostat -k 5 : "Cannot open
  /proc/stat: Cannot allocate memory"

  This can also be simply reproduced by entering: "cat /proc/stat", one
  to several (~5-10) times.

  strace on the "cat /proc/stat" method:
  ...exclude typical run-up...

  fstat(3, {st_mode=S_IFREG|0644, st_size=1607664, ...}) = 0
  mmap(NULL, 1607664, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fd755b77000
  close(3)                                = 0
  fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 5), ...}) = 0
  open("/proc/stat", O_RDONLY)            = -1 ENOMEM (Cannot allocate memory)
  write(2, "cat: ", 5cat: )                    = 5
  write(2, "/proc/stat", 10/proc/stat)              = 10
  open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
  fstat(3, {st_mode=S_IFREG|0644, st_size=2570, ...}) = 0
  mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd755d09000
  read(3, "# Locale name alias data base.\n#"..., 4096) = 2570
  read(3, "", 4096)                       = 0
  close(3)                                = 0
  munmap(0x7fd755d09000, 4096)            = 0
  open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)

  ...exclude typical throw-error via LC_MESSAGES/libc.mo...

  
  /proc/meminfo detail:
  # cat /proc/meminfo 
  MemTotal:       32947584 kB
  MemFree:          302664 kB
  Buffers:          154064 kB
  Cached:         21284268 kB
  SwapCached:      1728840 kB
  Active:         12576792 kB
  Inactive:       17279896 kB
  Active(anon):    5097984 kB
  Inactive(anon):  3320844 kB
  Active(file):    7478808 kB
  Inactive(file): 13959052 kB
  Unevictable:           0 kB
  Mlocked:               0 kB
  SwapTotal:      187617276 kB
  SwapFree:       185330320 kB
  Dirty:               148 kB
  Writeback:             0 kB
  AnonPages:       7048592 kB
  Mapped:           104312 kB
  Shmem:               604 kB
  Slab:            1947068 kB
  SReclaimable:    1523288 kB
  SUnreclaim:       423780 kB
  KernelStack:        8800 kB
  PageTables:        38260 kB
  NFS_Unstable:          0 kB
  Bounce:                0 kB
  WritebackTmp:          0 kB
  CommitLimit:    204091068 kB
  Committed_AS:   15333712 kB
  VmallocTotal:   34359738367 kB
  VmallocUsed:      163292 kB
  VmallocChunk:   34359457992 kB
  HardwareCorrupted:     0 kB
  AnonHugePages:     38912 kB
  HugePages_Total:       0
  HugePages_Free:        0
  HugePages_Rsvd:        0
  HugePages_Surp:        0
  Hugepagesize:       2048 kB
  DirectMap4k:      333824 kB
  DirectMap2M:    14313472 kB
  DirectMap1G:    18874368 kB

  
  This only seems to happens on specific hardware: Intel Server System P4000CP / S2600CP Motherboard, booted with kernel option: "pci=conf1"

  This does NOT happen on very similar hardware: Intel Server R2312GZ /
  S2600GZ Motherboard

  
  Is there a possible memory, or kernel memory sysctl configurable I'm missing here?

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