Re: 3.14-rc2 XFS backtrace because irqs_disabled.

Dave Jones
2014-02-15T22:28:58Z

On Sun, Feb 16, 2014 at 09:23:56AM +1100, Dave Chinner wrote:

> There's a pretty massive difference between the actual stack usage
> of the local variables and the amount of stack being used by the
> compiled code.
>
> What it appears to be is that the compiler is pushing 6-10 registers
> to the stack on every function call. So a function that only has 3
> local variables and does very little but allocate a structure and
> call other functions saves an 6 registers to the stack before it
> starts:

I've got a shitload of debug options enabled, which may explain it.
Or perhaps that new STACK_PROTECTOR_STRONG stuff ?

Dave