** Changed in: linux (Ubuntu Plucky)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Noble)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Jammy)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/2104911
Title:
sources list generation using dwarfdump takes up to 0.5hr in build
process
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Focal:
In Progress
Status in linux source package in Jammy:
Fix Committed
Status in linux source package in Noble:
Fix Committed
Status in linux source package in Oracular:
Won't Fix
Status in linux source package in Plucky:
Fix Committed
Status in linux source package in Questing:
Fix Released
Bug description:
[ 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.
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