** Description changed:

  [impact]
  glibc 2.32 contained a number of improvements to the memcpy routines for 
server-grade AArch64 implementations (in particular, graviton2 & graviton3). 
They should be backported to focal, as the LTS releases are by far the most 
used on servers.
  
  [test case]
- TBD.
+ The testcase from 
https://bugs.launchpad.net/ubuntu/focal/+source/glibc/+bug/1928508 can be used 
for this too.
  
  [regression potential]
  Rebuilding glibc is always a little risky (toolchain bugs and 
incompatibilities between the old and new versions can be surprising). But the 
autopkgtests and some manual general testing can help here.
  
  For this specific change, there is a potential risk that the new memcpy
  implementation could be used on a system where it is not in fact the
  fastest. We should run the test case not only on the systems where it is
  expected to help, but other systems such as the RPi4 and the launchpad
  build farm to ensure performance is not regressed there.

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https://bugs.launchpad.net/bugs/1951032

Title:
  AArch64: Backport memcpy improvements

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