I ran tests 1-3 with Frank's 1:1.2.13.dfsg-1ubuntu3. They all pass; the
performance improvement is also measurable.
Test 4 turned out to be meaningless: Ubuntu requires at least z13.
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> The fixes are each limited to one line, hence there are not many
issues to expect
Except that one of these one-line changes is stated to enable a new
optimization path in the shared library which was accidentally not
enabled before. Since almost everything in Ubuntu uses the shared
library and
Folded into the LP #1990379 uploads to Jammy, Kinetic and Lunar.
** Also affects: zlib (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: zlib (Ubuntu Kinetic)
Importance: Undecided
Status: New
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** Tags added: foundation-triage-discuss
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https://bugs.launchpad.net/bugs/1982583
Title:
Fix for zlib CRC32 optimization for s390x
Status in Ubuntu on IBM z
** Description changed:
+ SRU Justification:
+ --
+
+ [ Impact ]
+
+ * There were two issues identified in the current
+zlib CRC32 optimization for s390x implementation:
+
+ * 1) s390_crc32_vx() signature mismatch
+ which causes a warning
+
+ * 2)
I transferred the modification into a separate patch
(d/p/lp1982583-fix-for-zlib-crc32-optimization-for-s390x.patch),
and build a patched version (for all major architectures) in PPA for jammy and
kinetic:
https://launchpad.net/~fheimes/+archive/ubuntu/lp1990379+lp1982583
and attaching here the
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