APPLIED [unstable] Re: [SRU][Unstable/Q/P/N/J][PATCH 0/5] sources list generation using dwarfdump takes up to 0.5hr in build process (LP: #2104911)

[Timo Aaltonen]

Juerg Haefliger kirjoitti 11.8.2025 klo 15.35:
> BugLink: https://bugs.launchpad.net/bugs/2104911
> 
> [ Impact ]
> 
> In debian/rules.d/2-binary-arch.mk, stamp-build-% targets, we have:
> ```
> # Collect the list of kernel source files used for this build. Need to do this
> early
> # before modules are stripped. Fail if the resulting file is empty.
> find $(build_dir) \( -name vmlinux -o -name \*.ko \) -exec dwarfdump -i {} \; |
> \
>          grep -E 'DW_AT_(call|decl)_file' | sed -n 's|.*\s/|/|p' | sort -u > \
>          $(build_dir)/sources.list
> test -s $(build_dir)/sources.list
> ```
> 
> The process is single threaded and may takes up to half an hour to complete:
> ```
> $ time ...
> 
> real 28m15.167s
> user 54m32.917s
> sys 4m32.531s
> ```
> 
> [ Fix ]
> 
> This takes way too long. Parallelization introduces new/different issues. Remove
> the logic to collect the list of kernel source files during the build. We have
> all the data in the debug packages and can extract it after the build.
> 
> This reverts the changes for bug 2086606.
> 
> [ Test Plan ]
> 
> Inspect the build logs and the content of the linux-buildinfo packages to verify
> the data is no longer collected.
> 
> [ Where Problems Could Occur ]
> 
> Potential build failures.
> 

sounds good, applied to unstable

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t