[Bug 1763584] Re: ureadahead service fails with error Error while tracing: No such file or directory

[demon]

My system is being affected as well, I'm running Ubuntu 16.04.4 having
the same service failing to start.

There are a few reports of this on stackexchange as well with one
particular solution about patching the kernel:

https://unix.stackexchange.com/questions/308801/ureadahead-error-while-
tracing-possible-kernel-patch-problem.

I've also filed a bug with kernel.org :
https://bugzilla.kernel.org/show_bug.cgi?id=199861


Running ureadahead with strace directly from terminal yields:


# strace ureadahead --verbose --force-trace /

[..]
openat(3, "events/fs/do_sys_open/enable", O_RDWR) = -1 ENOENT (No such file or directory)
close(3)                                = 0
write(2, "ureadahead: Error while tracing:"..., 59ureadahead: Error while tracing: No such file or directory
[..]


and "/sys/kernel/debug/tracing/events/fs/do_sys_open/enable" does not exist.


** Bug watch added: Linux Kernel Bug Tracker #199861
   https://bugzilla.kernel.org/show_bug.cgi?id=199861

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https://bugs.launchpad.net/bugs/1763584

Title:
  ureadahead service fails with error Error while tracing: No such file
  or directory

Status in ureadahead package in Ubuntu:
  Confirmed

Bug description:
  I'm reporting this as duplicate of #1176536 to provide more info.

  dmig at dmig-Inspiron-5379:~$ systemctl status ureadahead.service 
  ● ureadahead.service - Read required files in advance
     Loaded: loaded (/lib/systemd/system/ureadahead.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Fri 2018-04-13 13:09:41 +07; 10min ago
   Main PID: 379 (code=exited, status=5)

  Apr 13 13:09:41 dmig-Inspiron-5379 ureadahead[379]: ureadahead: Error while tracing: No such file or directory
  Apr 13 13:09:41 dmig-Inspiron-5379 ureadahead[379]: Counted 8 CPUs

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ureadahead 0.100.0-20
  Uname: Linux 4.16.2-041602-generic x86_64
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Apr 13 13:13:26 2018
  InstallationDate: Installed on 2018-03-27 (16 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180327)
  SourcePackage: ureadahead
  UpgradeStatus: No upgrade log present (probably fresh install)

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