3.9 merge window kernels

poma pomidorabelisima at gmail.com
Wed Feb 27 00:16:20 UTC 2013


On 02/26/13 10:17, poma wrote:
> On 02/26/13 09:54, Antti Palosaari wrote:
> […]
>>> I want just know if I could reproduce that AF9015 error message or was
>>> it just warning. Is it something I have to fix for Kernel 3.10 or
>>> earlier. I am running Fedora 17 AMD64 and could surely compile any
>>> Kernel needed.
>>
>> OK, found it finally.
>> Kernel hacking  --->  Enable debugging of DMA-API usage
> 

On /boot/vmlinuz-3.9.0-0.rc0.git7.1.NONE_DMA_API_DEBUG.fc18.x86_64
with 'CONFIG_DMA_API_DEBUG is not set',
"WARNING(S): at lib/dma-debug.c…" are masked.
Thanks for pointing out.

> True.
> grep CONFIG_DMA_API_DEBUG /boot/config-3.*
> /boot/config-3.7.8-202.fc18.x86_64:# CONFIG_DMA_API_DEBUG is not set
> /boot/config-3.7.9-201.fc18.x86_64:# CONFIG_DMA_API_DEBUG is not set
> /boot/config-3.8.0-1.fc18.x86_64:# CONFIG_DMA_API_DEBUG is not set
> /boot/config-3.9.0-0.rc0.git5.1.fc18.x86_64:CONFIG_DMA_API_DEBUG=y
> /boot/config-3.9.0-0.rc0.git6.1.fc19.x86_64:CONFIG_DMA_API_DEBUG=y
> /boot/config-3.9.0-0.rc0.git7.1.fc19.x86_64:CONFIG_DMA_API_DEBUG=y
> 
>>
>> There was rather many DVB USB drivers using USB bulk buffers from the
>> stack. I will fix at least some of those, lets say for 3.10.
>>

After applying
http://git.linuxtv.org/anttip/media_tree.git/shortlog/refs/heads/dvb_usb_v2_stack
on '7d180f91eaabfbb813f1eda9e39e4445bfb826fc  branch 'master' of
git://linuxtv.org/media_build', all clear. :)
Tested on 3.9.0-0.rc0.git7.1.fc19.x86_64 with mplayer and mythbackend.

Even so,
on /boot/vmlinuz-3.9.0-0.rc0.git7.1.NONE_DEBUG.fc18.x86_64
with disabled debugging options, none of those warnings exist, including
skge's and solved ivtv's locking issue.

Besides there is no speed reduction regarding network part - skge.
Josh was right.

OK, Antti, Mauro, Josh thank you again. ;)

poma








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