** Description changed:
[ 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 ]
- Process modules in parallel.
+ 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.
[ Test Plan ]
- Inspect the build logs and verify reasonable run times for the
- collection. Should be single digit minutes.
+ 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 due to CPU and/or memory starvation.
+ Potential build failures.
** Description changed:
[ 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 ]
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 2104911.
+
[ 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.
** Description changed:
[ 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 ]
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 2104911.
+ 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.
** Description changed:
[ 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 ]
- 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 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.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2104911
Title:
sources list generation using dwarfdump takes up to 0.5hr in build
process
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2104911/+subscriptions
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