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However, I think that there is still unbuffered strace output that did not make it to the screen. | However, I think that there is still unbuffered strace output that did not make it to the screen. | ||
== $HOME? (jreiser) == | |||
During install from boot.iso DVD, then /mnt/sysimage has a "home/<<me>>" directory which contains a copy of my user $HOME at the time I ran pungi, even though I ran pungi within "su; cd" which set $CWD to /root. | |||
Revision as of 19:02, 9 August 2011
Boot problem (jreiser)
[2011-08-06 0000 UTC] Upon boot of DVD, then dracut drops to shell with the message:
Warning: No root device "live:/dev/disk/by-label/Fedora" found.
The file is present as
/dev/disk/by-label/Fedora 16 x86_64 DVD
with those three spaces. Reboot with quoting (single, or double, or backslash) also fails. Altering the boot parameter to
root=ID=ata_SONY_DVD_RW_AW_G-170A
also fails [that name is in my /dev/disk/by-id].
[2011-08-06 1700 UTC] After modifying pungi so that the label of the DVD has dashes "Fedora-16-x86_64-DVD" and changing the boot command line to include the dashes "root=live:CDLABEL=Fedora-16-x86_64-DVD", then dracut still complains "No root device \"live:/dev/disk/by-label/Fedora-16-x86_64-DVD\" found". The device is there, symlinked to ../../sr0 ==> /dev/sr0, and that is the correct name of the hardware drive.
[2011-08-07 0400 UTC] In the emergency shell after dracut cannot find the root, I can find it by:
mkdir /mnt1 /mnt2 /mnt3 mount -o ro,loop /dev/sr0 /mnt1 mount -o ro,loop /mnt1/images/install.img /mnt2 mount -o ro,loop /mnt2/LiveOS/rootfs.img /mnt3
but I cannot find how to specify that in a "root=live..." that dracut understands. It's also a mystery why so many mounts are necessary.
notes/solutions (wwoods)
- The DVD isn't built correctly - pungi changes the label of the image without changing the boot config file. Pungi will need to be fixed to handle that. (boot.iso should work fine.)
- I believe dracut expects spaces to be escaped, so it would need to be:
root=live:CDLABEL=Fedora%x2016%x20x86_64%x20DVD - As a workaround, you could just boot with
root=live:/dev/sr0
- I believe dracut expects spaces to be escaped, so it would need to be:
- The mounts are necessary because treebuilder images are live images, and all live images are ext4 images inside squashfs images inside an iso (CD/DVD) or vfat (USB stick) filesystem.
- Yes, that does seem needlessly complicated
- No, there isn't a simpler way to do it right now
mount traps when systemd mounts /tmp (hamzy)
Seen during booting:
... [ 11.992445] systemd[1]: tmp.mount mount process exited, code=killed status=11 [ 12.029660] systemd[1]: Job loader.service/start failed with result 'dependency'. [ 12.029695] systemd[1]: Unit tmp.mount entered failed state. ...
bash-4.2# systemctl status tmp.mount [ 71.988204] systemd[1]: Accepted connection on private bus. [ 71.988860] systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Manager.LoadUnit() on /org/freedesktop/systemd1 [ 71.989077] systemd[1]: Got D-Bus request: org.freedesktop.DBus.Properties.GetAll() on /org/freedesktop/systemd1/unit/tmp_2emount tmp.mount - Runtime Directory
Loaded: loaded (/lib/systemd/system/tmp.mount)
Active: inactive (dead)
Where: /tmp
What: tmpfs
CGroup: name=systemd:/system/tmp.mount
[ 71.990451] systemd[1]: Got D-Bus request: org.freedesktop.DBus.Local.Disconnected() on /org/freedesktop/DBus/Local
FIX:
boot with the following options
linux systemd.log_target=kmsg systemd.log_level=debug rd.break
run the following command in the shell
sed -i -e 's/tmp\.mount //' /sysroot/lib/systemd/system/loader.service
notes (wwoods)
- Only seems to happen on PPC64 systems
- This workaround has been added to the treebuilder branch; should be fixed for images built on or after Aug. 9
Slow (jreiser)
Treebuilder is slower. The first culprit looks like dracut.
| number | execve |
|---|---|
| 7606 | /bin/egrep |
| 2578 | /bin/cp |
| 1633 | /lib64/ld-linux-x86-64.so.2 |
| 1434 | /usr/bin/ldd |
| 1413 | /bin/ln |
| 1303 | /usr/local/bin/ln |
| 1303 | /usr/bin/ln |
| 1087 | /sbin/modinfo |
The second culprit is not honoring $TMPDIR, and not putting yumroot-$PID and installroot-$PID inside it.
| count | filename |
|---|---|
| 1693845 | * |
| 253387 | $DESTDIR/yumroot/... |
| 79977 | $DESTDIR/installroot/... |
| 44486 | /etc/xattr.conf |
| 41713 | /proc/self/task/31818/attr/fscreate |
| 25919 | /proc/self/task/1070/attr/fscreate |
| 20220 | /usr |
| 19487 | /etc/localtime |
| 18485 | /lib64/libc.so.6 |
| 18294 | /usr/share |
| 18184 | /etc/ld.so.cache |
| 18074 | /etc/ld.so.preload |
| 17213 | /usr/bin/ldd |
| 14471 | /bin/egrep |
| 9861 | /usr/share/locale |
| 9090 | /var/log/dracut.log |
| 9013 | /dev/null |
| 7529 | /sbin/modprobe |
| 6110 | . |
commentary (wwoods)
- This is pretty useless without some hard numbers. On my years-old test systems, I can complete a run in the following times:
| Arch | Time |
|---|---|
| x86_64 (treebuilder, bcj) | 19m15s (20m35s user, 2m56s system) |
| ppc64 (treebuilder, bcj) | 40m10s (28m46s user, 16m37s system) |
- If time is your primary concern, here's some speedup suggestions:
- Add this to /etc/lorax/lorax.conf:
[compression] bcj=off
The anaconda installer starts but then hangs (hamzy)
boot the 08/04/2011 iso image with the following options
linux systemd.log_target=kmsg systemd.log_level=debug rd.break
run the following command in the shell
sed -i -e 's/tmp\.mount //' /sysroot/lib/systemd/system/loader.service exit
You will see and then nothing else
Starting Anaconda version 16.14.
Change the file /lib/systemd/system/loader.service to start the loader like this
ExecStart=/usr/bin/strace -f -e write=3,4,5 /sbin/loader
This will run strace on the loader and produce the following output
[pid 606] <... read resumed> "", 4096) = 0
[pid 606] --- {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=910, si_status=0, si_utime=0, si_stime=1} (Child exited) ---
[pid 606] read(11, "", 4096) = 0
[pid 606] waitpid(910, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0) = 910
[pid 606] close(9) = 0
[pid 606] close(11) = 0
[pid 606] access("/mnt/install/source/.treeinfo", R_OK) = -1 ENOENT (No such file or directory)
[pid 606] umount("/mnt/install/source", 0) = 0
[pid 606] time(NULL) = 1312818684
[pid 606] send(6, "<143>Aug 8 15:51:24 loader: in "..., 62, MSG_NOSIGNAL) = 62
[pid 606] write(4, "15:51:24,021 DEBUG loader: in do"..., 61) = 61
| 00000 31 35 3a 35 31 3a 32 34 2c 30 32 31 20 44 45 42 15:51:24 ,021 DEB |
| 00010 55 47 20 6c 6f 61 64 65 72 3a 20 69 6e 20 64 6f UG loade r: in do |
| 00020 4c 6f 61 64 65 72 4d 61 69 6e 2c 20 73 74 65 70 LoaderMa in, step |
| 00030 20 3d 20 53 54 45 50 5f 4c 41 4e 47 0a = STEP_ LANG. |
[pid 606] select(3, [2], NULL, NULL, {0, 0}) = 0 (Timeout)
[pid 606] write(1, "\33[2;21H\33[m\17\33[30m\33[47m\342\224\214\342\224\200\342\224\200\342\224"..., 1926) = 1926
[pid 606] select(1, [0], [], [], NULL
The loader gets as far as outputting the following statement
15:06:02,581 DEBUG loader: in doLoaderMain, step = STEP_LANG.
However, I think that there is still unbuffered strace output that did not make it to the screen.
$HOME? (jreiser)
During install from boot.iso DVD, then /mnt/sysimage has a "home/<<me>>" directory which contains a copy of my user $HOME at the time I ran pungi, even though I ran pungi within "su; cd" which set $CWD to /root.