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The result of unit_get_sibling_mask returns bits for the sibling cgroups
even if they are not supported in the local system.
I caught this on a machine where my kernel was misconfigured with
CONFIG_MEMCG unset, but the rest of the cgroup infrastructure enabled.
Tested with `make check` on a host running a kernel where CONFIG_MEMCG
is not set.
It's primarily just a property of the Manager object after all, and we
try to refer to PID 1 as "manager" instead of "systemd", hence let's to
stick to this here too.
This patch removes includes that are not used. The removals were found with
include-what-you-use which checks if any of the symbols from a header is
in use.
Commit 637f421e5c ("cgroups: always propagate controller membership
to siblings") changed the mask propagation logic, but the test wasn't
updated.
Move to normal tests from manual tests, it should not touch the system
anymore.
It seems that unit_get_siblings_mask returns the controllers
filtered by what is available, but get_members_mask and
get_cgroup_mask do not. This just fixes the test following the
symptoms.
Also add a bit of debugging output to help diagnose problems,
add missing units, and simplify cppflags.
Move test-engine to normal tests from manual tests, it should now
work without destroying the system.
If -flto is used then gcc will generate a lot more warnings than before,
among them a number of use-without-initialization warnings. Most of them
without are false positives, but let's make them go away, because it
doesn't really matter.
Previously a cgroup setting down tree would result in cgroup membership
additions being propagated up the tree and to the siblings, however a
unit could never lose cgroup memberships again. With this change we'll
make sure that both cgroup additions and removals propagate properly.
The static analyzer scan-build had a few issues with analysing
parts of systemd.
gpt-auto-generator.c:
scan-build could not find blkid.h. Whether it should be blkid.h or
blkid/blkid.h seems to depend on the version used. We already use
blkid/blkid.h in udev-builtin-blkid.c so it seems safe to use that
here too.
Makefile.am:
Moved some -D's from CFLAGS to CPPFLAGS. I also simplified them a
bit and got rid of a left over DBUS_CFLAGS.
test-cgroup-mask.c/test-sched-prio.c
A variable was added to store the replaced TEST_DIR. When wrapped
in an assert_se TEST_DIR was not replaced in the logged error.
While not an issue introduced in this patch we might as well fix
it up while we are here.
