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Message-ID: <20190719120043.GA15320@infradead.org>
Date: Fri, 19 Jul 2019 05:00:43 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Jason Gunthorpe <jgg@...pe.ca>
Cc: Pavel Machek <pavel@....cz>, Christoph Hellwig <hch@...radead.org>,
john.hubbard@...il.com, SCheung@...dia.com,
akpm@...ux-foundation.org, aneesh.kumar@...ux.vnet.ibm.com,
benh@...nel.crashing.org, bsingharora@...il.com,
dan.j.williams@...el.com, dnellans@...dia.com,
ebaskakov@...dia.com, hannes@...xchg.org, jglisse@...hat.com,
jhubbard@...dia.com, kirill.shutemov@...ux.intel.com,
linux-kernel@...r.kernel.org, liubo95@...wei.com,
mhairgrove@...dia.com, mhocko@...nel.org,
paulmck@...ux.vnet.ibm.com, ross.zwisler@...ux.intel.com,
sgutti@...dia.com, torvalds@...ux-foundation.org,
vdavydov.dev@...il.com
Subject: Re: [PATCH] mm/Kconfig: additional help text for HMM_MIRROR option
On Fri, Jul 19, 2019 at 08:48:53AM -0300, Jason Gunthorpe wrote:
> It is like MMU_NOTIFIERS, if something needs it, then it will select
> it.
>
> Maybe it should just be a hidden kconfig anyhow as there is no reason
> to turn it on without also turning on a using driver.
We can't just select it due to the odd X86_64 || PPC64 dependency.
Which also answers Pavels question: you never really need it, as we
can only use it for optional functionality due to that.
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