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[Parameswaran Sivatharman <para.siva@xxxxxxxxxxxxx>]

I will not be able to test this with the upstream kernels because this
bug occurs during an installation using an iso image. So the kernel will
have to be in the iso image for me to to further test this.

Thanks


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

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https://bugs.launchpad.net/bugs/1389304

Title:
  Kernel trace during encrypted home dir vivid desktop installations
  (async_page_fault)

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  The following trace appears during a vivid desktop installation with
  encrypted home dir setup.

  2014-11-04T13:08:50.904446+00:00 utah-29294-vivid-amd64 kernel: [  245.136823] gtk-update-icon cpuset=session-c1.scope mems_allowed=0
  2014-11-04T13:08:50.904451+00:00 utah-29294-vivid-amd64 kernel: [  245.136831] CPU: 0 PID: 9528 Comm: gtk-update-icon Not tainted 3.16.0-24-generic #32-Ubuntu
  2014-11-04T13:08:50.904453+00:00 utah-29294-vivid-amd64 kernel: [  245.136832] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
  2014-11-04T13:08:50.904454+00:00 utah-29294-vivid-amd64 kernel: [  245.136835]  0000000000000000 ffff8800089bb908 ffffffff8177fcbc ffff880019f265e0
  2014-11-04T13:08:50.904455+00:00 utah-29294-vivid-amd64 kernel: [  245.136837]  ffff8800089bb970 ffffffff8177c3e8 0000000000000003 0000000000000000
  2014-11-04T13:08:50.904456+00:00 utah-29294-vivid-amd64 kernel: [  245.136839]  ffff88001fffae28 ffff8800089bb940 0000000000000206 ffffffff81c670c0
  2014-11-04T13:08:50.904457+00:00 utah-29294-vivid-amd64 kernel: [  245.136843] Call Trace:
  2014-11-04T13:08:50.904458+00:00 utah-29294-vivid-amd64 kernel: [  245.136859]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
  2014-11-04T13:08:50.904459+00:00 utah-29294-vivid-amd64 kernel: [  245.136862]  [<ffffffff8177c3e8>] dump_header+0x9e/0x205
  2014-11-04T13:08:50.904461+00:00 utah-29294-vivid-amd64 kernel: [  245.136870]  [<ffffffff8116cea5>] oom_kill_process+0x205/0x360
  2014-11-04T13:08:50.904462+00:00 utah-29294-vivid-amd64 kernel: [  245.136872]  [<ffffffff8116d68d>] out_of_memory+0x4cd/0x510
  2014-11-04T13:08:50.904463+00:00 utah-29294-vivid-amd64 kernel: [  245.136879]  [<ffffffff8117454e>] __alloc_pages_nodemask+0xb6e/0xbb0
  2014-11-04T13:08:50.904463+00:00 utah-29294-vivid-amd64 kernel: [  245.136885]  [<ffffffff811b6a41>] alloc_pages_current+0xb1/0x160
  2014-11-04T13:08:50.904464+00:00 utah-29294-vivid-amd64 kernel: [  245.136888]  [<ffffffff81169497>] __page_cache_alloc+0xa7/0xc0
  2014-11-04T13:08:50.904465+00:00 utah-29294-vivid-amd64 kernel: [  245.136890]  [<ffffffff8116bb67>] filemap_fault+0x1b7/0x410
  2014-11-04T13:08:50.904466+00:00 utah-29294-vivid-amd64 kernel: [  245.136896]  [<ffffffff81194c6d>] __do_fault+0x3d/0xc0
  2014-11-04T13:08:50.904468+00:00 utah-29294-vivid-amd64 kernel: [  245.136899]  [<ffffffff81197210>] do_read_fault.isra.57+0x50/0x300
  2014-11-04T13:08:50.904469+00:00 utah-29294-vivid-amd64 kernel: [  245.136902]  [<ffffffff81199286>] handle_mm_fault+0x896/0xf90
  2014-11-04T13:08:50.904470+00:00 utah-29294-vivid-amd64 kernel: [  245.136910]  [<ffffffff8105ce42>] __do_page_fault+0x1c2/0x580
  2014-11-04T13:08:50.904471+00:00 utah-29294-vivid-amd64 kernel: [  245.136919]  [<ffffffff810a9de8>] ? __enqueue_entity+0x78/0x80
  2014-11-04T13:08:50.904472+00:00 utah-29294-vivid-amd64 kernel: [  245.136922]  [<ffffffff810abb55>] ? set_next_entity+0x95/0xb0
  2014-11-04T13:08:50.904472+00:00 utah-29294-vivid-amd64 kernel: [  245.136940]  [<ffffffff810116a6>] ? __switch_to+0x1d6/0x5e0
  2014-11-04T13:08:50.904474+00:00 utah-29294-vivid-amd64 kernel: [  245.136943]  [<ffffffff8105d2b1>] trace_do_page_fault+0x41/0x100
  2014-11-04T13:08:50.904475+00:00 utah-29294-vivid-amd64 kernel: [  245.136950]  [<ffffffff81055659>] do_async_page_fault+0x29/0xe0
  2014-11-04T13:08:50.904476+00:00 utah-29294-vivid-amd64 kernel: [  245.136957]  [<ffffffff81789db8>] async_page_fault+0x28/0x30

  Steps to reproduce:
  1. Install utah:
            sudo apt-add-repository -y ppa:utah/stable
            sudo apt-get update
            sudo apt-get install utah

  2.  Make the iso readable by the user utah

  3.  Run 
     "sudo -u utah -i run_utah_tests.py -i /path/to/the/vivid-desktop-amd64.iso -p lp:ubuntu-test-cases/desktop/preseeds/encrypted_home.cfg lp:ubuntu-test-cases/desktop/runlists/encrypted_home.run -f /var/log/installer -x /etc/utah/bridged-network-vm.xml"

  Now the trace above could be seen. 
  The installation log containing the kernel log is attached.

  Note: This is reproducible with vm's provisioned with 512 MB memory,
  which is the default value in /etc/utah/bridged-network-vm.xml in the
  host machine. With 1G RAM this kernel trace is not reproducible.

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