for convenience, the diff for the noble upload. we'll do a binary copy for the upload to -proposed, because the package needs to reach the security pocket as well.
** Patch added: "dpkg.debdiff" https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/2064539/+attachment/5801859/+files/dpkg.debdiff ** Description changed: Power's Linux ABIs all require an explicit call chain be stored on the call stack frames which are all accessible via the stack pointer. Therefore, having a (soft/simulated) frame pointer does not improve backtraces at all on Power. However, forcing a frame pointer via the -fno-omit-frame-pointer option negatively affects performance for multiple reasons: extra prologue/epilogue overhead and fewer shrink-wrapping opportunities. Given -fno-omit-frame-pointer does not provide any improvements (backtraces or otherwise) and only reduces performance, -fno-omit-frame-pointers should not be used on Power. + + SRU: + + these changes were implemented during the opening of the oracular + series. The very same changes are backported to 24.04 LTS. These only + affect the ppc64el and s390x architectures, for other architectures it's + a no-change upload. + + We didn't see any fallout for these changes during the development on + the oracular series, and therefore don't expect any fallout or + regressions in 24.04 LTS either. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2064539 Title: Revert back frame pointers for ppc64el (remove -fno-omit-frame- pointer) Status in The Ubuntu-power-systems project: New Status in dpkg package in Ubuntu: Fix Released Status in glibc package in Ubuntu: New Status in linux package in Ubuntu: New Status in dpkg source package in Noble: New Status in glibc source package in Noble: New Status in linux source package in Noble: New Status in dpkg source package in Oracular: Fix Released Status in glibc source package in Oracular: New Status in linux source package in Oracular: New Bug description: Power's Linux ABIs all require an explicit call chain be stored on the call stack frames which are all accessible via the stack pointer. Therefore, having a (soft/simulated) frame pointer does not improve backtraces at all on Power. However, forcing a frame pointer via the -fno-omit-frame-pointer option negatively affects performance for multiple reasons: extra prologue/epilogue overhead and fewer shrink-wrapping opportunities. Given -fno-omit-frame-pointer does not provide any improvements (backtraces or otherwise) and only reduces performance, -fno-omit-frame-pointers should not be used on Power. SRU: these changes were implemented during the opening of the oracular series. The very same changes are backported to 24.04 LTS. These only affect the ppc64el and s390x architectures, for other architectures it's a no-change upload. We didn't see any fallout for these changes during the development on the oracular series, and therefore don't expect any fallout or regressions in 24.04 LTS either. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/2064539/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
