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From: | Pekka Enberg |
Subject: | Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels |
Date: | Mon, 7 Nov 2011 22:09:34 +0200 (EET) |
User-agent: | Alpine 2.02 (LFD 1266 2009-07-14) |
On Mon, 7 Nov 2011, Frank Ch. Eigler wrote:
The ABI design allows for that kind of flexible extensibility, and it's one of its major advantages. What we *cannot* protect against is you relying on obscure details of the ABI [...]Is there some documentation that clearly spells out which parts of the perf syscall userspace ABI are "obscure" and thus presumably changeable?
That's actually something the KVM and virtio folks have done a great job with IMHO. Both ABIs are documented pretty extensively and the specs are kept up to date.
I guess for perf ABI, "perf test" is the closest thing to a specification so if your application is using something that's not covered by it, you might be in trouble.
Pekka
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