| === chris14_ is now known as chris14 | ||
| * alkisg rolls up sleeves, grabs ubuntu-23.04-beta-live-server-amd64.iso, and decides to spend the morning on this... wish me luck :) | 05:25 | |
| arighi | alkisg, thanks, I'll also investigate a bit more on this today, let me know if you find anything.. and good luck! | 05:37 |
|---|---|---|
| alkisg | Comparing jammy server with lunar server, with init=/bin/bash. | 05:45 |
| alkisg | Original: jammy=91M, lunar=145M. So smaller diff than the desktop versions, but still significant. | 05:45 |
| alkisg | With MODULES=dep, the initramfs size shrinked from 126M to 63M. Still lunar=145M, so it's not related to the initramfs size. | 05:45 |
| alkisg | Purging the following packages shrinked the initrd to just 18M but made no difference to used RAM: linux-modules-extra-6.2.0-20-generic, amd64-microcode, intel-microcode | 05:51 |
| === lifeless_ is now known as lifeless | ||
| alkisg | Swapping the kernels (6.2 on 22.04 and 5.15 on 23.04) made no difference | 06:26 |
| arighi | alkisg, have you created a bug in launchpad for this issue already? | 06:40 |
| alkisg | arighi: no, I don't know where to file it yet! | 06:40 |
| arighi | arighi, ok, just wanted to double check, I'll create one later | 06:41 |
| alkisg | Currently I'm completely puzzled. I copied the whole /boot, and the difference is still there! I see an "unsupported ext4 FEATURE_C12", checking if it's related to the ext4 module and file system... | 06:41 |
| alkisg | I added `copy_exec /bin/free /bin` in /usr/share/initramfs-tools/hooks, to copy the `free` command to the initramfs. | 07:11 |
| alkisg | Now I'm testing with `break=top`, even before udev runs. There, jammy=35M, lunar=340M used RAM. | 07:11 |
| alkisg | If I wasn't seeing this with my own eyes, I wouldn't believe the bug reporter... :) | 07:11 |
| alkisg | arighi: I think I found the major difference, it's in what `free` reports. | 08:07 |
| alkisg | With `break=bottom`, if I mount a jammy disk and `chroot /root free`, it says 65M, while with a lunar disk at that exact point, it says 500M. | 08:07 |
| alkisg | So the "used" column is different, yet the "available" column is the same. | 08:07 |
| arighi | alkisg, hm.. interesting, how does /proc/meminfo look like? | 08:23 |
| arighi | this would tell us if the difference is actually in free showing a different result, because theoretically it should read all the mem info from /proc/meminfo | 08:23 |
| alkisg | I have to do something urgent, back later on :/ | 08:35 |
| arighi | alkisg, ack, no problem, take your time | 08:37 |
| alkisg | arighi: https://termbin.com/4mjk | 09:17 |
| arighi | alkisg, I see only one /proc/meminfo, that is in lunar I assume, it'd be nice to see /proc/meminfo also in the jammy case | 09:27 |
| alkisg | arighi: that test was: "boot jammy with break=bottom; so only the initramfs is loaded; then chroot to jammy and run free, or chroot to lunar and run free" | 09:29 |
| alkisg | So it's a different interpretation of the SAME /proc/meminfo file | 09:29 |
| arighi | alkisg, moreover I'm wondering if this is related to: https://gitlab.com/procps-ng/procps/-/commit/2184e90d2e7cdb582f9a5b706b47015e56707e4d | 09:29 |
| -ubottu:#ubuntu-kernel- Commit 2184e90 in procps-ng/procps "library: modify calculation of 'MEMINFO_MEM_USED' item" | 09:29 | |
| arighi | alkisg, ahh ok got it! thanks for the clarification | 09:29 |
| alkisg | That's probably it. So I think it's a false alarm. I did read the procps news and changelog, that commit didn't stand out, thanks for pointing me to it | 09:29 |
| arighi | yeah I'm pretty sure jammy's procps doesn't have that commit | 09:30 |
| alkisg | Based on my tests so far, I think 22.10 doesn't have it either | 09:31 |
| arighi | alkisg, according to the git log the commit has been introduced in procps v4.0.1 | 09:31 |
| arighi | 22.10 is using a 3.3.17 | 09:32 |
| alkisg | OK everything matches; that's it; thanks a lot for your help on this :) | 09:32 |
| arighi | and lunar 4.0.3-1ubuntu1 | 09:32 |
| arighi | so yeah, I think it all makes sense now :) | 09:32 |
| arighi | thank you for reporting this alkisg | 09:33 |
| alkisg | 👍️ | 09:33 |
| LocutusOfBorg | arighi, its autopkgtests.ubuntu.com not having them | 10:53 |
| arighi | LocutusOfBorg, hm... it doesn't have EFI? | 10:56 |
| LocutusOfBorg | who knows? :) | 10:56 |
| arighi | so the kernel is right at complaining :) | 10:57 |
| LocutusOfBorg | meh, who can know this? | 11:12 |
| LocutusOfBorg | in Debian autopkgtests are EFI enabled I would say | 11:12 |
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