Re: [RFC][PATCH 0/5] arch: atomic rework

[Ramana Radhakrishnan]

On 02/06/14 18:25, David Howells wrote:
> Is it worth considering a move towards using C11 atomics and barriers and
> compiler intrinsics inside the kernel?  The compiler _ought_ to be able to do
> these.


It sounds interesting to me, if we can make it work properly and 
reliably. + gcc@xxxxxxxxxxx for others in the GCC community to chip in.

> One thing I'm not sure of, though, is how well gcc's atomics will cope with
> interrupt handlers touching atomics on CPUs without suitable atomic
> instructions - that said, userspace does have to deal with signals getting
> underfoot. but then userspace can't normally disable interrupts.
>
> David

Ramana

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/