Re: Memory barriers and spin_unlock safety

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

 



Linus Torvalds <[email protected]> wrote:

> Note that _normal_ writes never need an SFENCE, because they are ordered 
> by the core.
> 
> The reason to use SFENCE is because of _special_ writes.

I suspect, then, that x86_64 should not have an SFENCE for smp_wmb(), and that
only io_wmb() should have that.

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

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux