Rough notes from Kernel Consolidation meeting

Paul E. McKenney paulmck at linux.vnet.ibm.com
Mon Sep 20 17:19:49 BST 2010


Hello!

Please see below for my rough notes from the kernel consolidation,
and please reply to the group with any errors or omissions.

							Thanx, Paul

------------------------------------------------------------------------

Attendees: Arnd Bergmann, Dave Martin, Jeremy Kerr, John Stultz,
	Mounir Bsaibes, Nat Waddell, Nicolas Pitre, Steve Sakoman,
	Paul E. McKenney.

o	Kernel Consolidation -> Kernel.  Job 1 will of course continue
	to be kernel consolidation, but will continue to take on other
	kernel work.

o	Kernel requirements
	(https://wiki.linaro.org/Internal/TSC/MinutesToBeAgreed)

o	Virtualization requirements
	(https://wiki.linaro.org/Internal/TSC/MinutesToBeAgreed)
	Arnd Bergmann, Dave Martin.  Discussion of implementation
	strategy -- full virtualization vs. paravirtualization.
	TrustZone.

o	Requirements schedule

	o	Requirements discussion, mostly in TSC.
	o	Discussion and refinement at Orlando.
	o	Blueprint generation in the 2-3 weeks following Orlando.

o	Round table:

	o	Arnd Bergmann: BKL work mostly submitted.  Looking into
		I/O spaces and SoCs -- address-space annotation.
	o	Dave Martin: One perftools patch to be pushed to mainline.
		John Rigby working on build of perftools.
	o	Jason Hui: iMX51 work on device trees.  Need assignment.
		Reviewed BSP review, need to send results to Loïc et al.
	o	Jeremy Kerr: Device tree response to review comments, API.
		Adding more platforms into device tree -- use device-tree
		properties.
	o	John Stultz: OMAP emulation environment work -- preparation
		for clock consolidation.  Networking is not working.
		First revision of POSIX clock RTC patch, working second
		revision.
	o	Mounir Bsaibes: New presentation for blueprints, almost
		done.  Working on howto for writing specifications.
		Tracking mechanism.
	o	Nat Waddell: Several Versatile Express bugs fixed last
		week, especially frame-buffer tearing problem.  Lorenzo's
		kernel built and boots, but cannot get frame-buffer display
		working.  Device-tree problem?  [Follow up with Lorenzo.]
	o	Nicolas Pitre: Merge bug fixes for ARM, including some
		GDB vector-page-backtrace problems (related to atomic
		operations).  Pulled upstream patches from mainline.
		SECCOMP support -- syscall restrictions for untrusted
		code.
		Q: /dev/mem protection from Kees Cook?  A: Might.
	o	Paul McKenney: TSC meeting.  RCU bugs, priority boosting.
	o	Steve Sakoman: Expansion-board detection in uboot for
		OMAP3, save environments for eMMC for boards lacking
		flash memory, bring Panda support to latest 8-layer
		boards just appearing (about 12 patches required).
		Expect to submit upstream later this week.
	o	Dave Martin on holiday Thu through next week.



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