[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH 0/4] unsafe big.LITTLE support

On 15/02/18 23:16, Stefano Stabellini wrote:
Hi all,

Hi Stefano,

This series changes the initialization of two virtual registers to make
sure they match the value of the underlying physical cpu.

It also disables cpus different from the boot cpu, unless a newly
introduced command line option is specified. In that case, it explains
how to setup the system to avoid corruptions, which involves manually
specifying the cpu affinity of all domains, because the scheduler still
lacks big.LITTLE support.
On top of this series, I think we want to rework how we read the size of the cacheline. At the moment, we only read it on the boot CPU. But they may be different on each CPUs.

So I would replace that variable by reading the cacheline size everytime from system registers. This should quicker than trying to read the memory to know the cacheline size.

Note that I suggested this as a small tasks for Outreachy/GSOC.


Julien Grall

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.