WR1043ND - too big kernel

[hiren panchasara]

On Fri, Sep 5, 2014 at 12:15 PM, Piotr Kubaj <pkubaj at riseup.net> wrote:
> On 09/05/2014 19:59, hiren panchasara wrote:
>> On Thu, Sep 4, 2014 at 2:27 PM, hiren panchasara <hiren at freebsd.org> wrote:
>>> On Thu, Sep 4, 2014 at 1:44 PM, hiren panchasara <hiren at freebsd.org> wrote:
>>>> On Thu, Sep 4, 2014 at 1:39 PM, Piotr Kubaj <pkubaj at riseup.net> wrote:
>>>>> Adding following lines to kernel config shrinks size to 1750991 (on
>>>>> releng/10.0):
>>>>> makeoptions     INLINE_LIMIT=768
>>>>> nomakeoptions   DEBUG
>>>>> nomakeoptions   ALQ
>>>>> nooptions       INET6
>>>>> options         NO_SWAPPING
>>>>> nooptions       HWPMC_HOOKS
>>>>> nodevice        hwpmc
>>>>> nodevice        hwpmc_mips24k
>>>>> nooptions       KDB
>>>>>
>>>>> Any ideas what else I can remove? :P
>>>>
>>>> I see you already have r255656.
>>>> Let me try to build for -head and see.
>>>
>>>
>>>> [mktplinkfw] *** error: kernel image is too big. Max[1572352] kernel img [2000794]
>>>
>>> ugh. Need to trim more. I'll see if I can find time this week to check
>>> where/what we can trim.
>>
>> Randomly disabled a ton of things and then I could create small enough
>> kernel. I'm not even sure if things will actually work.
>>
>> We've grown too big, it seems :-(
>>
>> Diffs against -head.
>>
>> Index: sys/mips/conf/TP-WN1043ND
>> ===================================================================
>> --- sys/mips/conf/TP-WN1043ND   (revision 271137)
>> +++ sys/mips/conf/TP-WN1043ND   (working copy)
>> @@ -16,7 +16,7 @@
>>  options         AR71XX_REALMEM=32*1024*1024
>>
>>  # i2c GPIO bus
>> -device         gpioiic
>> +#device                gpioiic
>>  device         iicbb
>>  device         iicbus
>>  device         iic
>> @@ -28,7 +28,7 @@
>>  device         rtl8366rb
>>
>>  # read MSDOS formatted disks - USB
>> -options        MSDOSFS
>> +#options       MSDOSFS
>>
>>  # Enable the uboot environment stuff rather then the
>>  # redboot stuff.
>> @@ -57,3 +57,29 @@
>>  nooptions      WITNESS_SKIPSPIN
>>  nooptions      DEBUG_REDZONE
>>  nooptions      DEBUG_MEMGUARD
>> +
>> +nooptions         DDB
>> +nooptions         KDB
>> +nooptions         ALQ
>> +nooptions         HWPMC_HOOKS
>> +nodevice          hwpmc
>> +nodevice          hwpmc_mips24k
>> +nooptions         INET6                   #InterNETworking
>> +
>> +nooptions         ATH_DEBUG
>> +nooptions         AH_DEBUG
>> +nooption          AH_DEBUG_ALQ
>> +nooptions         IEEE80211_DEBUG
>> +nooptions         IEEE80211_SUPPORT_MESH
>> +nooptions         IEEE80211_SUPPORT_TDMA
>> +nooptions         IEEE80211_ALQ   # 802.11 ALQ logging support
>> +
>> +nodevice          usb
>> +nooptions         USB_EHCI_BIG_ENDIAN_DESC
>> +nooptions         USB_DEBUG
>> +nooptions         USB_HOST_ALIGN
>> +nodevice          umass
>> +nodevice          ehci
>> +
>> +nodevice       gpio
>> +nodevice       gpioled
>>
> I could've done it myself, but I need usb and GPIO is required for usb,
> so that needs to stay. That said, I removed PSEUDOFS (I don't need
> /proc) and some of what you mailed, so now it's smaller, but still too
> large (1682325). Here are the contents (still on releng/10.0)
> # Force the board memory - 64mb
> options         AR71XX_REALMEM=64*1024*1024
>
> makeoptions     INLINE_LIMIT=768
> nomakeoptions   DEBUG
> nomakeoptions   ALQ
> nooptions       INET6
> options         NO_SWAPPING
> nooptions       HWPMC_HOOKS
> nodevice        hwpmc
> nodevice        hwpmc_mips24k
> nooptions       USB_DEBUG
> nooptions       IEEE80211_DEBUG
> nooptions       PSEUDOFS
> nooptions         ATH_DEBUG
> nooptions         AH_DEBUG
> nooption          AH_DEBUG_ALQ
> nooptions         IEEE80211_SUPPORT_MESH
> nooptions         IEEE80211_SUPPORT_TDMA
> nooptions         IEEE80211_ALQ   # 802.11 ALQ logging support
>
> # i2c GPIO bus
> device          gpioiic
> device          iicbb
> device          iicbus
> device          iic
>
> # ethernet switch device
> device          etherswitch
>
> # RTL8366RB support
> device          rtl8366rb
>
> # Enable the uboot environment stuff rather then the
> # redboot stuff.
> options         AR71XX_ENV_UBOOT
>
> # uncompress - to boot natively from flash
> device         geom_uncompress
> options                GEOM_UNCOMPRESS
>
> # Used for the static uboot partition map
> device          geom_map
>
> # Boot off of the rootfs, as defined in the geom_map setup.
> options                ROOTDEVNAME=\"ufs:map/rootfs.uncompress\"
>
> # We bite the performance overhead for now; the kernel won't
> # fit if the mutexes are inlined.
> options        MUTEX_NOINLINE
> options        RWLOCK_NOINLINE
> options        SX_NOINLINE
>
> # Remove everything we don't need.  We need a _really_ small kernel!
> nooptions      INVARIANTS
> nooptions      INVARIANT_SUPPORT
> nooptions      WITNESS
> nooptions      WITNESS_SKIPSPIN
> nooptions      DEBUG_REDZONE
> nooptions      DEBUG_MEMGUARD
> nooptions      DDB
> nooptions      KDB
>
> It doesn't need to be much smaller now, but what made it so large? Why
> did it work a year ago with 10.0-CURRENT? Since 10.0-RELEASE is too
> large and there are working images with 10.0-CURRENT from August 2013 at
> http://www.strugglingcoder.info/pkgs/TP-WN1043ND.factory.bin (it seems
> to be actually generated by you), something must have happened  then and
> later, when CURRENT went up to 11.

"More code" happened :-)

This clearly is not a good sign. I'll try to spend some time to narrow
the source down.
We _should_ at least be able to "not-include" that portion.

cheers,
Hiren