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[Bug 1508471] [NEW] [SRU] arm64 performance regression in wily 4.2 kernel on m400 due to dropped patch

 

Public bug reported:

>From trusty through to vivid there is a copy_to/from_user patch that
improved performance on the m400. This patch was not pushed into wily's
4.2 kernel as a new one was nearing upstream acceptance. That patch has
now landed in linux-next and needs to be backported to wily's 4.2
kernel.

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Craig Magina (craig.magina)
         Status: In Progress

** Changed in: linux (Ubuntu)
       Status: New => In Progress

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Craig Magina (craig.magina)

** Summary changed:

- arm64 performance regression in wily 4.2 kernel on m400 due to dropped patch
+ [SRU] arm64 performance regression in wily 4.2 kernel on m400 due to dropped patch

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https://bugs.launchpad.net/bugs/1508471

Title:
  [SRU] arm64 performance regression in wily 4.2 kernel on m400 due to
  dropped patch

Status in linux package in Ubuntu:
  In Progress

Bug description:
  From trusty through to vivid there is a copy_to/from_user patch that
  improved performance on the m400. This patch was not pushed into
  wily's 4.2 kernel as a new one was nearing upstream acceptance. That
  patch has now landed in linux-next and needs to be backported to
  wily's 4.2 kernel.

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