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[Bug 882147] Re: overlayfs does not implement inotify interfaces correctly


Notice the comment #30 above:

Also note that there is some confusion about known behavior of released
kernels.  I suggest that if a kernel is released and it's select() call
does not behave appropriately that every application that uses select()
should be patched to detect if it's running under such a kernel, though
there are other opinions.

For example the kernel will detect known problems with FPUs/CPUs and
handle these appropriately, such should be the way with applications and
released kernel APIs.

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  overlayfs does not implement inotify interfaces correctly

Status in coreutils package in Ubuntu:
  In Progress
Status in linux package in Ubuntu:
Status in coreutils source package in Precise:
Status in linux source package in Precise:

Bug description:
  When using tail on the liveCD some updates are not reported.  This
  seems to be triggered by tail using inotify to identify modified
  files.  Overlayfs does not appear to be implementing inotify quite the
  way you might hope reporting only against the underlying filesystems.

  Related bugs:
   * bug 1213925:  upstart should notice "/etc" inode change

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-12-generic 3.0.0-12.20
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 0/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC0:  apw        2296 F.... pulseaudio
   /dev/snd/pcmC0D0c:   apw        2296 F...m pulseaudio
   /dev/snd/pcmC0D0p:   apw        2296 F...m pulseaudio
   Card hw:0 'Intel'/'HDA Intel at 0xfc700000 irq 47'
     Mixer name	: 'Intel Cantiga HDMI'
     Components	: 'HDA:111d7675,1028029f,00100103 HDA:80862802,80860101,00100000'
     Controls      : 20
     Simple ctrls  : 11
  Date: Wed Oct 26 17:46:16 2011
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=d8328455-deac-4bae-877d-c408d371cefe
  MachineType: Dell Inc. Studio 1537
   PATH=(custom, user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=cf503727-25f2-4ecd-b0f3-2b894523bcba ro quiet splash vt.handoff=7
   linux-restricted-modules-3.0.0-12-generic N/A
   linux-backports-modules-3.0.0-12-generic  N/A
   linux-firmware                            1.60
  SourcePackage: linux
  UpgradeStatus: Upgraded to oneiric on 2011-10-17 (9 days ago)

  dmi.bios.date: 09/22/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A03
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A03
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd09/22/2008:svnDellInc.:pnStudio1537:pvrA03:rvnDellInc.:rn:rvrA03:cvnDellInc.:ct8:cvrA03:
  dmi.product.name: Studio 1537
  dmi.product.version: A03
  dmi.sys.vendor: Dell Inc.

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