[PATCH v2 2/2] restrict /dev/mem to idle io memory ranges
dan.j.williams at intel.com
Tue Nov 24 17:28:54 PST 2015
On Tue, Nov 24, 2015 at 4:47 PM, Andrew Morton
<akpm at linux-foundation.org> wrote:
> On Tue, 24 Nov 2015 16:34:19 -0800 Dan Williams <dan.j.williams at intel.com> wrote:
>> > IOW, a very good description of the problem-being-solved would help out
>> > a lot here...
>> I'll fold the eventual result of this discussion into the changelog if
>> I can convince you it's worth moving forward.
> I'm easily convinced ;) Please let's get all the info into the right
> place, make sure it answers the thus-far-asked questions (at least) and
> we'll take it from there.
> And please do have a think about switching as much as possible over to
> runtime-configurability. Because "please echo foo > /proc" is a heck
> of a lot nicer than "please reboot with iomem=" which is a heck of a lot
> nicer than "please ask vendor for a new kernel".
Actually, we already have runtime configuration. For example, if you
want to muck with pmem via /dev/mem, just do this first:
echo namespace0.0 > /sys/bus/nd/drivers/nd_pmem/unbind
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