Re: kernel deadlock

[Peter Zijlstra]

On Mon, Sep 09, 2013 at 01:29:47PM -0700, John Stultz wrote:
> Ingo: This makes me think we really should have some lockdep smarts
> added to seqlock/seqcount structures. Is there something already
> discovered thats preventing this, or has this just not yet been tried?

The only reason this hasn't been done in the past is because of the VDSO
I believe. We use a seqcount_t from userspace.

We either have to open-code the VDSO version or create a variant for
that specific single use case.
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