Re: [PATCH v28 16/22] x86/sgx: Add a page reclaimer

[Sean Christopherson]

On Fri, Mar 06, 2020 at 08:47:02PM +0200, Jarkko Sakkinen wrote:
> On Thu, Mar 05, 2020 at 11:03:54AM -0800, Sean Christopherson wrote:
> > We've also discussed taking a file descriptor to hold the backing, but
> > unless I'm misreading the pagecache code, that doesn't solve the incorrect
> > accounting problem because the current task, i.e. evicting task, would be
> > charged.  In other words, whether the backing is kernel or user controlled
> > is purely an ABI question.
> 
> Even if the file is owned by a different process the account happens
> to "current"?

Yes.  Which makes sense as files do not have a 1:1 association with tasks.