Re: [PATCH 0/3] perf_event: enable overflow interrupts on KNC

From: Ingo Molnar
Date: Thu Oct 18 2012 - 14:54:32 EST

* Vince Weaver <vincent.weaver@xxxxxxxxx> wrote:

> I looked into getting a 3.7 kernel up and going on the KNC
> board, but the diff between Intel's release and stock
> has 70k lines. Much of that is kdb, but there's
> also a lot of low-level changes too, some of it due to the
> fact that KNC is 64-bit x86 but has no support for SSE (so you
> need to handle that properly or none of your userspace will
> run).

Getting that support upstream would definitely be useful, so if
you feel so inclined splitting out (or creating anew) the
required patches ...

I don't know how it's structured, but making the !SSE
distinction runtime would be strongly preferred over any
compile-time .config switchery. Otherwise, the guiding principle
is that we'll do whatever it takes to support the hardware, with
the reasonably best possible cleanliness.


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