ipv4/tcp.c:4234:1: error: the frame size of 1152 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

[Shuah Khan]

On 9/8/21 11:05 AM, Arnd Bergmann wrote:
> On Wed, Sep 8, 2021 at 4:12 PM Shuah Khan <skhan at linuxfoundation.org> wrote:
>> On 9/7/21 5:14 PM, Linus Torvalds wrote:
>>> The KUNIT macros create all these individually reasonably small
>>> initialized structures on stack, and when you have more than a small
>>> handful of them the KUNIT infrastructure just makes the stack space
>>> explode. Sometimes the compiler will be able to re-use the stack
>>> slots, but it seems to be an iffy proposition to depend on it - it
>>> seems to be a combination of luck and various config options.
>>>
>>
>> I have been concerned about these macros creeping in for a while.
>> I will take a closer look and work with Brendan to come with a plan
>> to address it.
> 
> I've previously sent patches to turn off the structleak plugin for
> any kunit test file to work around this, but only a few of those patches
> got merged and new files have been added since. It would
> definitely help to come up with a proper fix, but my structleak-disable
> hack should be sufficient as a quick fix.
> 

Looks like these are RFC patches and the discussion went cold. Let's pick
this back up and we can make progress.

https://lore.kernel.org/lkml/CAFd5g45+JqKDqewqz2oZtnphA-_0w62FdSTkRs43K_NJUgnLBg@mail.gmail.com/

thanks,
-- Shuah