Re: [PATCH RFC] x86: avoid atomic operation intest_and_set_bit_lock if possible

[Jack Steiner]

> 
> This cacheline bouncing was actually observed and measured
> on SGI UV systems, but I'm not certain we're permitted to publish
> that data. I'm copying the two SGI guys who had reported that
> issue (and the special case fix, which Nikanth simply generalized)
> to us, for them to decide.

We frequently run into the cacheline bouncing issues. I don't have
the data handy that you refer to, but feel free to publish it.

--- jack


--
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/