[Bug 1932010] Re: [21.10 FEAT] zlib CRC32 optimization for s390x

[Launchpad Bug Tracker]

This bug was fixed in the package zlib - 1:1.2.11.dfsg-2ubuntu7

---------------
zlib (1:1.2.11.dfsg-2ubuntu7) impish; urgency=medium

  [ Simon Chopin ]
  * d/rules: use configure options for dfltcc instead of hardcoding
    the CFLAGS
  * d/p/lp1932010-ibm-z-add-vectorized-crc32-implementation.patch
    ported from zlib-ng #912, adding a vectorized implementation
    of CRC32 on s390x architectures based on kernel code. LP: #1932010

  [ Michael Hudson-Doyle ]
  * d/p/lp1932010-ibm-z-add-vectorized-crc32-implementation.patch: adjust to
    not make a PLT call in an ifunc on s390/s390x.

 -- Simon Chopin <simon.chopin at canonical.com>  Thu, 12 Aug 2021 15:45:49
+1200

** Changed in: zlib (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1932010

Title:
  [21.10 FEAT] zlib CRC32 optimization for s390x

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in zlib package in Ubuntu:
  Fix Released

Bug description:
  Use SIMD instructions to accelerate the zlib CRC32 implementation.
  Business value: Performance improvement in database area

  The zlib CRC32 optimization for IBM Z is currently being discussed for inclusion into zlib-ng:
  https://github.com/zlib-ng/zlib-ng/pull/912

  The patch for zlib will be based on that.

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