Reminder of boot-time SIG meeting for April

Hey Linux Boot-Time SIG interested parties (and other interested Linux kernel developers),

Here is the information for the next Linux Boot-Time SIG conference call.

The meeting will be held via the Jitsi online meeting platform.
To Join the meeting via web, click on:
https://meet.jit.si/LinuxBootTimeSIG

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Our next meeting is Tuesday, April 22, at 9:00 am Mountain Daylight Time.
See this link for other time zones:
https://www.timeanddate.com/worldclock/meetingdetails.html?year=2025&month=04&day=22&hour=15&min=0&sec=0&p1=220&p2=137&p3=195&p4=771
(That makes it 8:00 am Pacific, 15:00 UTC, 17:00 CET, and 20:30 IST)

I'm planning on 1 hour for this meeting.

The agenda for the meeting (and where we'll keep the minutes) is here:
https://docs.google.com/document/d/1XAufoTT6VVJOTMzKMoz8SyOss-JA9H4J1_yVXQq5mN0/edit?usp=sharing

The agenda for the April 22 meeting is:
 - Round-table of on-going work
    - Work on the Boot Time wiki (section of elinux wiki) https://elinux.org/Boot_Time
    - Status of the Boot Time Data wiki (on birdcloud.org) https://birdcloud.org/boot-time/Boot_Data
    - patches in flight:
       - init/main.c: print initcall level when initcall_debug is used (Francesco Valla)
       - analyze-initcall-debug.py (Francesco Valla)
    - work pending submission upstream:
       - show_delta version 2.0 (Tim Bird)
       - deferred initcalls (Tim Bird)
    - Are there any other patches in flight?
       - What are people working on?
          - deferred memory init (Qualcomm?)
          - boot caching (the Good Penguin?)
          - unified boot log (TI)
             - CPU cycle counter logging (for firmware, kernel, user-space)
       - Status of Sony boot-time work:
          - boot time wiki (grab-boot-data.sh, boot-data repository, and BootRegion wiki processor)
          - boot markers -> boot regions -> common printks (nothing published yet)
       - Status of RedHat boot time work?
           - [Eric] - patches submitted a couple of years ago - mounting volumes - might trigger errors
           - Are currently tracking boot-time variances
       - Status of Texas Instruments boot time work?
          - [Vishnu] - update on work on boot markers (passing cycle-count timestamps between firmware and kernel)
          - During startup, firmware runs on different processors, with different cycle-counters.
            - Need generic mechanisms for handling tagging of timestamps, passing data between systems
       - Status of Qualcomm deferred memory init patch?
         - Qualcomm not on call, but TI is interested in seeing this, and other deferred init work, mainlined
  - Review of project ideas
     - See https://elinux.org/Boot_Time_Project_Ideas
       - TGP (The Good Penguin) has some stuff they did with boot caching - see the page for details
  - Review of action items
        
  - Engaging more developers
    - Next meeting - Tuesday, May 27, 9:00 am Mountain Daylight Time
    - current periodicity = 1 month (the 4th Tuesday of every month
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I look forward to talking with you in the meeting.
 -- Tim