Am 12.10.2016 um 15:51 schrieb Valo, Kalle:
David Hutchison <dhutchi...@bluemesh.net> writes:

I am using a Mikrotik hAP AC Lite which has a QCA9887 radio. It
appears to be working; however ath10k ( or the qca9887 firmware ) is
utilizing 15 - 20mb of memory. I applied the kfree(caldata) patch, to
insure there is no memory leak.

It doesn't appear to be leaking, and it will run Ok with the high
memory footprint. However the Mikrotik hAP AC Lite is only a 64mb
platform; so when I initialize the 2nd radio with ath9k I get OOMs.

It just doesn't seem right that when ath10k + qca9887 is in AP mode
that it's utilizing as much memory as it is. I don't think the issue
is with ath10k, I think it's the qca9887 firmware (
firmware-5.bin_10.2.4-1.0-00013 ).

Is there a newer build available that may potentially fix these memory
issues? The latest one available on
https://github.com/kvalo/ath10k-firmware/blob/master/QCA9887/hw1.0/firmware-5.bin_10.2.4-1.0-00013
is 2 months old. Perhaps there is a newer build to test that may have
the fix?

Any thoughts as to what it could be? I can provide more information if needed.
64MB of RAM nowadays is not much and ath10k is not really tested in such
setups AFAIK. I guess you could try if reducing TARGET_10X_NUM_MSDU_DESC
helps with the memory consumption, but no idea if that would even work
without further modifications to ath10k.

Also if you have fq-codel&co enabled that might increase memory
consumption. Adding linux-wireless as people there might have better
the high memory consumption is a very common old problem. and no, 64 mb might not by much. but consider that qca9880 cards for instance are only used on embedded devices. there is not even a windows driver available for it. its mainly used in routers and 64 mb ram is not uncommon here. the problem with qca9887 sounds similar here. and the best. it only occures on ath10k. with the closed source qca driver it will work on embedded platforms. since it was mentioned that this problem is caused by the firmware itself. so there wont be a solution until qca is finally getting in touch with this problem
ideas.



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