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
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