[Bug 1333499] Re: PowerPC 8xx dcbz workaround impacts 64bit

[Adam Conrad]

** Also affects: glibc (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: eglibc (Ubuntu)
       Status: New => Invalid

** Changed in: glibc (Ubuntu Trusty)
       Status: New => Invalid

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to eglibc in Ubuntu.
https://bugs.launchpad.net/bugs/1333499

Title:
  PowerPC 8xx dcbz workaround impacts 64bit

Status in “eglibc” package in Ubuntu:
  Invalid
Status in “glibc” package in Ubuntu:
  New
Status in “eglibc” source package in Trusty:
  New
Status in “glibc” source package in Trusty:
  Invalid

Bug description:
  On ppc64 we notice each process calls mfpvr twice. This faults and
  gets emulated in the kernel.

  We have counters to track this:

  # cat /sys/kernel/debug/powerpc/emulated_instructions/mfpvr
  2370
  # cat /sys/kernel/debug/powerpc/emulated_instructions/mfpvr
  2372
  # cat /sys/kernel/debug/powerpc/emulated_instructions/mfpvr
  2374

  This was traced back to an 8xx workaround for a dcbz issue.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/1333499/+subscriptions