IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 19 March 2016 (all times are UTC)
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| 07:34 | alkisg_away is now known as alkisg | |
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| 07:48 | <alkisg> vagrantc: the initramfs scripts all need the prereqs stanza, otherwise they get to run when update-initramfs is called
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| 07:48 | Hopefully they weren't doing much harm so far... :)
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| 07:49 | (e.g. if you had ltsploop in the server's kernel cmdline, it would move your root file system when you ran update-initramfs)
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| 07:49 | <vagrantc> ouch
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| 08:08 | <alkisg> Fix committed in http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/2721
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| 08:10 | !learn alkisg-todo as "Remove the 5 sec initramfs delay due to resume="
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| 08:10 | <ltsp> The operation succeeded.
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| 10:03 | <alkisg> Yey, client boot time in 16.04 dropped from 45 seconds to 27 seconds by bypassing all the initramfs delay bugs due to nbd :)
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| 10:04 | There's another 10 second delay but it's inside the ubuntu kernel, can't do much about that... :-/
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| 10:04 | Pitty, it would make it boot in under 20 seconds then
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| 10:07 | Ouch, precise didn't have that bug and so it booted in 10 seconds
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| 12:54 | <alkisg> Ah, precise didn't have that bug with kernel=3.2, it did have it with kernel=3.13
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| 13:36 | !kvm
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| 13:36 | <ltsp> kvm: Virtual thin client: kvm -vga-vmware -ctrl-grab -no-shutdown -net nic,model=virtio -net user,tftp=/var/lib/tftpboot,bootfile=/ltsp/i386/pxelinux.0
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| 19:41 | <alkisg> stgraber: udhcpc in 16.04 is a symlink to busybox, but it doesn't work in the initramfs because busybox-initramfs doesn't have it while busybox-static does have it
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| 19:42 | stgraber: one way around it is to drop udhcpc support and use ipconfig, but I think you wanted udhcpc because it supported lease renewal?
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| 19:43 | Any ideas? Currently 16.04 only works with IPAPPEND 3...
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| 20:24 | <alkisg> Ah, in 12.04 udhcpc was also a symlink... something goes wrong with copy_exec then
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| 20:51 | <maldridge> alkisg: in my tests with void, I'm at just under 20s to boot
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| 20:52 | and that's for fat clients, I haven't figured out how to do thin ones yet
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| 20:52 | <alkisg> maldridge: can you put your dmesg to pastebin?
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| 20:53 | <maldridge> I can't at the moment, those testbeds are at work
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| 20:53 | <alkisg> I got it down to 8 secs with kvm, which doesn't suffer that issue
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| 20:53 | <maldridge> I'm doing all this on kernel 4.4 btw, that might have something to do with it
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| 20:53 | <alkisg> 4.4 here as well
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| 20:54 | I think that the ip=xxx issue is ubuntu-specific
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| 20:54 | <maldridge> huh, I don't have the slowdown you mention, so I agree it is ubuntu-specific
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| 20:54 | <alkisg> Your dmesg will help in verifying if it's ubuntu-specific or not
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| 20:54 | You wouldn't be seeing it in non-ltsp clients, only in ltsp clients
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| 20:55 | <maldridge> sure, I can grab it later today in theory, they're doing electrical work and so the power is off currently
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| 20:55 | <alkisg> Ah, let me just try it in a fedora vm...
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| 20:58 | Haha Debian does some weird clock calibration and goes from 0 to 70 secs
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| 20:58 | <maldridge> I should mention that I'm not necessarily using the "normal" ltsp boot process
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| 20:59 | I'm pulling my rootfs into ram over http since I only need 2 apps
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| 20:59 | <alkisg> As long as you have an ip= in the kernel cmdline
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| 20:59 | <maldridge> ah, I do not, that gets handled by my initramfs
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| 21:00 | some of this I'm still learning, the initramfs is still kind of hazy as to how its getting access to the proper rootfs
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| 21:00 | <alkisg> If `cat /proc/cmdline` in the client doesn't show an ip=xxx entry, then you could add it to pxelinux just to test, even if it does nothing
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| 21:01 | Nope, Debian doesn't have that issue either
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| 21:01 | So it's quite probably Ubuntu-specific
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| 21:01 | <maldridge> sure, I'll make note of that and test it when able
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| 21:02 | I've noticed a lot of ubuntu specific wierdness, part of the reason I'm migrating away from it
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| 21:02 | it was a nice stepping stone, but it seems to be less and less "LTS" with every release
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| 21:03 | <alkisg> I don't like it when it diverts from debian too much
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| 21:04 | <maldridge> yeah that gets old fast
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| 21:04 | <alkisg> But it does have some nice things like various kernels and xorg for the lts releases
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| 21:04 | PPAs and recipes etc
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| 21:04 | <maldridge> given that MS Windows is rolling now, we're trying a rolling linux at one of my sites, I'm excited to see how it goes
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| 21:11 | <alkisg> stgraber: confirmed, copy_exec on 12.04 copies udhcpc (=busybox static) to the initramfs, while on 16.04 it symlinks it, breaking it
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| 21:18 | * alkisg tries: copy_exec /bin/busybox /sbin/udhcpc | |
| 21:22 | <alkisg> Yey! 12 secs to LDM! :)
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| 21:23 | I hope I can get all those fixes in the proper places, so that 16.04 boots as fast as 12.04.1 did...
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