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Cache information in x86_64 ld.so --list-diagnostics output (RHEL-21997)

Merged Florian Weimer requested to merge fweimer-rh/centos_rpms_glibc:RHEL-21997 into c8s
All threads resolved!

Scratch build is clean, except for the kernel bug that misreports z16 as z900 in AT_PLATFORM.

Resolves: RHEL-21997

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  • While this is a custom downstream-only backport it does the minimal required to get ld.so --list-diagnostics working on RHEL8. It is very minimal and reuses the existing static functions in cacheinfo.h to a very good purpose; we recompute early in ld.so the values we are going to compute in libc.so.6 but only for the purposes of printing diagnostic information and the code is safely shared between both built objects. It also doesn't add the L1/L2/L3 values to the output because they aren't there in RHEL8 today and that's a future enhancement that belongs only in RHEL9.

    Reviewed-by: Carlos O'Donell carlos@redhat.com

  • Carlos O'Donell (Red Hat) approved this merge request

    approved this merge request

  • resolved all threads

  • requested review from @codonell-rh

  • Florian Weimer started a merge train

    started a merge train

  • merged

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