[Bug 1567096] Comment bridged from LTC Bugzilla

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------- Comment From boger at us.ibm.com 2016-04-14 09:01 EDT-------
This bug affects anything that uses one of the epoll* syscalls that returns information in the EpollEvent structure that was incorrectly defined for ppc64/ppc64le in golang.  Without this fix those syscalls will return incorrect event information, and many of the tests in fsnotify fail.  It wasn't found until upstream Docker hit it, but I think it could affect more than just Docker.

The fix consists only of correctly defining the data structure used by
these syscalls and only for ppc64le/ppc64 so I don't think it is very
risky.

On the other hand, I just requested it get into go 1.6.2, I think that
should go in, but I don't know what kind of time line we are talking
about for Ubuntu 16.04 golang to move to that.

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https://bugs.launchpad.net/bugs/1567096

Title:
  Docker doesn't work since Containerd integration

Status in golang-1.6 package in Ubuntu:
  New

Bug description:
  -- Problem Description --
  Docker build hangs indefinitely when run using a 1.11.0 binary built after containerd integration, and go 1.6 on ppc64le. Doing the same thing works with gccgo.

  Looking at the differences in docker logs shows that the containerd
  event "exit", never happens when using a binary built with gc.
  fsnotify, the file system handler for go, doesn't seem to receive the
  correct event when a file is either written to, or closed, which I
  believe is whats causing this issue.

  Link to fsnotify issue which shows some failing tests :
  https://github.com/fsnotify/fsnotify/issues/130

  I have a patch that fixes the errors when I run fsnotify.  I am
  preparing it for submission now and should be out there as a golang CL
  this morning.

  Do you want the patch so you can rebuild golang with it?  If fsnotify
  is a separate package then you will have to rebuild it with the new
  golang.

  Here's the CL link if you want to get the patch for ppc64le:  https://go-review.googlesource.com/#/c/21582/
  Go to the upper right where it says download and I think if you select patch file it will give you the patch.

  We'll update with more info after testing the patch Lynn submitted,
  but we wanted to let Canonical know about this issue in the meantime
  since 1.11 is about to GA upstream.

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