Re: Kernel stack overflow on 2.6.9-rc2

[Denis Vlasenko <vda@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

On Tuesday 14 September 2004 20:55, Richard B. Johnson wrote:
> Has anybody ever explained why there is an attempt to
> minimize the size of the kernel stack? Temporary data
> allocation on the stack is FREE! The compiler just
> adjusts offsets for data. Even dynamic data-allocation
> takes only one instruction, (subl %reg, %esp).

IIRC it is done in order to be able to support large number
of threads on 32-bit machines and to avoid needing to do
a order-1 allocation at fork().
--
vda