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Date:   Mon, 7 Mar 2022 17:44:17 +0200
From:   Jarkko Sakkinen <jarkko@kernel.org>
To:     Dave Hansen <dave.hansen@intel.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Nathaniel McCallum <nathaniel@profian.com>,
        Reinette Chatre <reinette.chatre@intel.com>,
        linux-sgx@vger.kernel.org, jaharkes@cs.cmu.edu,
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        codalist@telemann.coda.cs.cmu.edu, linux-unionfs@vger.kernel.org,
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Subject: Re: [PATCH RFC v2] mm: Add f_ops->populate()
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On Mon, Mar 07, 2022 at 07:29:22AM -0800, Dave Hansen wrote:
> On 3/7/22 03:27, Jarkko Sakkinen wrote:
> > But e.g. in __mm_populate() anything with (VM_IO | VM_PFNMAP) gets
> > filtered out and never reach that function.
> > 
> > I don't know unorthodox that'd be but could we perhaps have a VM
> > flag for SGX?
> 
> SGX only works on a subset of the chips from one vendor on one
> architecture.  That doesn't seem worth burning a VM flag.

What do you think of Matthew's idea of using ra_state for prediction?

BR, Jarkko