What: 94th HelenOS project meeting
When: Dec 17, 2016
Where: http://www.maneska.com/
Who: MD, VH, JJ
Scribe: JJ
Round table:
MD:
- temporary fix for #669
- planning to make a HelenOS release after January 15
VH:
- WiP: rewrite of the CI script into Python
JJ:
- sun4v status: the sun4v support will be hopefully merged into QEMU
after 2.8, HelenOS already runs on this new QEMU sun4v machine
- sun4u status
- demo of lp:~jakub/helenos/sun4u
- main idea: be able to have usable sun4u QEMU machine with
serial console
- collateral damage: all platforms should be able to have at least
a serial userspace console merely by providing a serial port
driver which puts itself into the 'serial' category
- IRQ window
- needed for IRQ remapping on sparc64 (PCI irq 0x2b becomes
system-wide IRQ 0x7eb)
- similar to the current PIO window provided by the parent driver
- not currently implemented due to a workaround in the ISA driver
(use dedicated configuration file for EBUS with the IRQ already
remapped)
- EBUS vs. ISA
- using the ISA driver for EBUS with alternate configuration
- serial devices used as input and output devices and waiting for
them
- input currently considers all serial character devices that
put themselves into the 'serial' category
- output currently considers the first character device to put
itself into the 'serial' category
- need to have a list (in a per-platform config file or boot
arguments) that says what serial devices can be used as the
console and consider/wait only for those
- Ultra 5+60 update:
- added external NVRAM battery, both systems appear stable
- FOSDEM
- JJ will do a HelenOS yearly update talk at FOSDEM 2017
- unrelated thoughts and recommendations
- we should support multiple answerboxes per task and pair them
with async ports
- we could replace kernel's B+tree with the RB-tree from uspace for
more accurate memory reservations (unlike the B+tree, the RB-tree
does not allocate memory on its own)
- we should: provide async_ wrappers for purely asynchronous IPC
with callbacks
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