Re: [PATCH 0/5] Blackfin SMP like patchset

Andrew Morton
2008-11-19T06:57:19Z

On Tue, 18 Nov 2008 17:05:03 +0800 Bryan Wu <cooloney@kernel.org> wrote:

>
> Hi folks,
>
> We provide the SMP like functions for our Blackfin dual core processor
> BF561 for almost 1 year. And after a long time developing, debugging and
> internal review, we'd like to post them to LKML for other maintainer
> review.
>
> Please find our wiki page about this SMP like patches:
> http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like

Would prefer that changelogs be self-contained, please. Kernel
changelogs are for ever, and I doubt if that page will be there in 20
years time.

Particularly when that page must be read to learn fundamental things such as

The SMP support in certain Blackfin processors is describe as `SMP
Like' rather than just `SMP' due to the lack of hardware cache
coherency. A true SMP system would have support for cache coherency
in hardware.

On all `SMP Like' setups, cache coherency is maintained via
software mechanisms

Interesting!