Re: [PATCH v7 1/4] qrwlock: A queue read/write lock implementation

[Andi Kleen]

Peter Zijlstra <peterz@xxxxxxxxxxxxx> writes:

> On Wed, Dec 18, 2013 at 11:38:29AM -0800, Andi Kleen wrote:
>> (maybe it would be time to get rid of the patchable LOCK though?)
>
> With the argument that Intel simply doesn't ship UP chips anymore, with
> the exception of quark which should probably run custom UP kernels due
> to size constraints anyway?

That, and:

- Anything with a single core only has very fast LOCK
- LOCK generally became much faster everywhere.
- The original reason was for single cpu VM guests, but even those
should increasingly have at least two VCPUs.

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
--
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/