Alex Keybl [:akeybl] Reporter
	Description • 12 years ago

Unagi phones are using an unrepresentative amount of memory. We need to limit that.

	Michael Wu [:mwu] Assignee
	Comment 1 • 12 years ago

A new kernel with memory usage clamped to otoro levels is up.

	Alex Keybl [:akeybl] Reporter
	Comment 2 • 12 years ago

The kernel was pulled out of nightlies until QA can take a look at builds with the new Kernel.

	Chris Jones [:cjones] inactive; ni?/f?/r? if you need me
	Comment 3 • 12 years ago

I think this is borderline dogfooding-blocker.  Without this change, we're not going to be getting realistic reporting of lowmem problems.  It's going to take a fair bit of time to set up a FOTA server that meets all our constraints, so saying "we can just fix this in a FOTA update" is not a reasonable answer.

On the other hand, we have lots of known dumb excessive memory usage that will be fixed by the time FOTA is ready.  We may suffer from lots of dups if we ship a kernel with realistic memory allocations before all the dumb stuff is fixed.  And if those dumb bugs cause us to lose dogfooders, it would be a massive net loss.

I think the risk from the latter is greater than the potential benefit from the former, so I wouldn't block dogfooding on this.

	Chris Lee [:clee]
	Comment 4 • 12 years ago

mwu, do we have any idea when we'll get a new Unagi kernel that limits the amount of memory available?

	Michael Wu [:mwu] Assignee
	Comment 5 • 12 years ago

(In reply to Chris Lee [:clee] from comment #4)
> mwu, do we have any idea when we'll get a new Unagi kernel that limits the
> amount of memory available?

We already have one. It was pulled so QA can take a look at it.

	Andrew Overholt [:overholt]
	Comment 6 • 12 years ago

Vlad was asking about CPU differences; do we know what they'll be?

	Chris Jones [:cjones] inactive; ni?/f?/r? if you need me
	Comment 7 • 12 years ago

He already asked me about that.  But there's nothing to worry about CPU-wise.  Ping me privately for details.

	Thomas Zimmermann [:tzimmermann] [:tdz]
	Comment 8 • 12 years ago

FYI, there is 

  https://github.com/tdz/memeater

which lets you grab a certain amount of memory.

	Chris Jones [:cjones] inactive; ni?/f?/r? if you need me
	Comment 9 • 12 years ago

That's not quite enough because we want to tweak static pmem allocations too.

There's nothing to do here, we already have a kernel build that's configured to look just like otoro.  I'm running it on my dogfooding phone.  We just need the FOTA support to push it out.

	Alex Keybl [:akeybl] Reporter
	Comment 10 • 12 years ago

Marking for C2, given this meets the criteria of known P1/P2 blocking-basecamp+ bugs at the end of C1.

	Dietrich Ayala (:dietrich)
	Comment 11 • 12 years ago

Has this been pushed out via FOTA yet?

	Chris Jones [:cjones] inactive; ni?/f?/r? if you need me
	Comment 12 • 12 years ago

We missed the boat when we distributed phones without this.  Mozilla can't push it out now.  We need to get updates through the vendor set up and the vendor push it.

I'm going to go ahead and close this because there's nothing left that we can do.