Hi Vitaly, if I understand the proposal correctly, the consequences will be far less dramatic than you believe. > So all Fedora packages will take 2x (x86_64-v1, x86_64-v2) disk space? > Am I right? 1. Not all packages but only those whose maintainers explicitly opt in. 2. The duplication will affect only the executable ELFs - i.e. the contents of `/usr/bin` - shipped by these packages. There will be no duplication of shared libraries, data files or anything else. > What will happen if the system was installed on x86_64-v2 and then > copy-pasted to another machine with x86_64-v1? The symbolic link will > point to x86_64-v2 binary, which will cause a segmentation fault, > resulting in the system not being able to boot. The system will simply keep working: there will be no symlinks to microarchitecture-specific variants of the ELF binaries. The proposal talks about symlinking to a central helper binary whose task is to look up the most specific µ-arch variant of the desired executable. One effect this *will* have is a slightly increased latency for launching an affected program. List - please chime in if I've misunderstood anything there. Best regards, Christoph
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