HugeTLBFS

[genuap]

I'm considering using HugeTLBFS - I'm just wondering if anyone has implemented it before, and what your experience was.

And, as an additional question - has anyone ported it and used it under 32-bit linux?

Thanks,

Paul

[scottwood]

HugeTLB is supported on recent 32-bit mpc85xx/QorIQ kernels, as long as you have large physical address support enabled.

[genuap]

Thanks - what about without large phys address (i.e. only 32-bit addressing). My understanding is that the MMU code is different and unsupported. Anyone ever try it or back-port it to a strictly 32-bit machine?

Thanks,

Paul

[scottwood]

It is not supported if large physical address support is turned off.  There should be no problem enabling large physical address support on any mpc85xx/QorIQ chip, even if the chip doesn't support 36-bit physical.  It's about Linux's internal data structures, not the hardware.