Re: [PATCH] perf, x86: Fall back to vmalloc for BTS buffer allocation

[Andi Kleen]

> We did this once, and that blew up big time.
> 
> Even now, vmalloc_fault() has a very explicit:
> 
>   WARN_ON_ONCE(in_nmi());
> 
> So this isn't going to happen until you fix that.

Good point.

We just need to call vmalloc_sync_all at allocation time,
no need to change vmalloc_fault.

-Andi



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