[Bug 1647864] Re: google-perftools can deadlock with dlopen on startup

Brian Murray brian at ubuntu.com
Fri May 5 16:39:51 UTC 2017


Hello Sage, or anyone else affected,

Accepted google-perftools into yakkety-proposed. The package will build
now and be available at https://launchpad.net/ubuntu/+source/google-
perftools/2.4-0ubuntu5.16.10.1 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: google-perftools (Ubuntu Yakkety)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

** Changed in: google-perftools (Ubuntu Xenial)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1647864

Title:
  google-perftools can deadlock with dlopen on startup

Status in google-perftools package in Ubuntu:
  Fix Released
Status in google-perftools source package in Xenial:
  Fix Committed
Status in google-perftools source package in Yakkety:
  Fix Committed

Bug description:
  [Impact]
  Applications use tcmalloc and deadlock on startup (specifically impacting upstream testing of Ceph).

  [Test Case]
  Hard to reproduce reliably, so we'll perform a regression test with Ceph in Ubuntu and look for feedback from upstream on occurrance of this problem.

  [Regression Potential]
  Low; patch is already in use in CentOS and RHEL and has been accepted into upstream.

  [Original Bug Report]
  On the xenial version of libgoogle-perftools, tcmalloc can deadlock with dlopen on startup.  This was fixed upstream here:

   https://github.com/gperftools/gperftools/issues/786

  FWIW el7 also backported this fix to 2.4 to resolve this for us.

  The ceph bug tracking this issue is here:

   http://tracker.ceph.com/issues/13522

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