Messages in this thread | | | Date | Thu, 29 Mar 2012 00:01:26 +0200 (CEST) | From | Jiri Kosina <> | Subject | cgroups commit 61d1d219c4 breaks systemd |
| |
Hi,
I am not able to boot current Linus' tree on system which is using systemd. In the early boot phase I get
Failed to create root cgroup hierarchy: No such process Failed to allocate manager object: No such process
and that's it, the system is completely unusable afterwards (not having any console spawned, no networking, etc).
Bisection pointed to
commit 61d1d219c4c0761059236a46867bc49943c4d29d Author: Mandeep Singh Baines <msb@chromium.org> Date: Mon Jan 30 12:51:56 2012 -0800
cgroup: remove extra calls to find_existing_css_set
and I have verified that reverting this single commit on top of current Linus' tree makes the problem go away and the system boots properly.
strace output shows that with 61d1d219c applied, systemd is failing while trying to add itself to the systemd cgroup:
mkdir("/sys", 0755) = -1 EEXIST (File exists) mkdir("/sys/fs", 0755) = -1 EEXIST (File exists) mkdir("/sys/fs/cgroup", 0755) = -1 EEXIST (File exists) mkdir("/sys/fs/cgroup/systemd", 0755) = -1 EEXIST (File exists) mkdir("/sys/fs/cgroup/systemd/system", 0755) = 0 open("/sys/fs/cgroup/systemd/system/tasks", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 6 fstat(6, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f60c4ecb000 write(6, "357\n", 4) = -1 ESRCH (No such process) close(6) = 0 munmap(0x7f60c4ecb000, 4096) = 0 writev(3, [{"<27>", 4}, {"systemd", 7}, {"[357]: ", 7}, {"Failed to create root cgroup hierarchy: No such process", 55}, {"\n", 1}], 5) = 74 open("/sys/fs/cgroup/systemd/system/tasks", O_RDONLY|O_CLOEXEC) = 6 fstat(6, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f60c4ecb000 read(6, "357\n", 4096) = 4 open("/sys/fs/cgroup/systemd/tasks", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 7 fstat(7, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f60c4eca000 write(7, "357\n", 4) = -1 ESRCH (No such process) close(7) = 0 munmap(0x7f60c4eca000, 4096) = 0 read(6, "", 4096) = 0 close(6) = 0 munmap(0x7f60c4ecb000, 4096) = 0 open("/sys/fs/cgroup/systemd/system/tasks", O_RDONLY|O_CLOEXEC) = 6 fstat(6, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f60c4ecb000 read(6, "", 4096) = 0 close(6) = 0 munmap(0x7f60c4ecb000, 4096) = 0 open("/sys/fs/cgroup/systemd/system", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 6 getdents(6, /* 7 entries */, 32768) = 240 getdents(6, /* 0 entries */, 32768) = 0 lstat("/sys/fs/cgroup/systemd/system/tasks", {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 rmdir("/sys/fs/cgroup/systemd/system") = 0 close(6) = 0 close(4) = 0 close(5) = 0 close(0) = 0 writev(3, [{"<27>", 4}, {"systemd", 7}, {"[357]: ", 7}, {"Failed to allocate manager object: No such process", 50}, {"\n", 1}], 5) = 69
-- Jiri Kosina SUSE Labs
| |