With this patch set, an unmodified application would either use:
1) whatever memory it happened to get
2) only the faster dram (via numactl --membind=)
3) only the slower pmem (again, via numactl --membind1)
4) preferentially one or the other (numactl --preferred=)
Yet another option:
On 1/17/19 8:29 AM, Jeff Moyer wrote:
>> Persistent memory is cool. But, currently, you have to rewrite
>> your applications to use it. Wouldn't it be cool if you could
>> just have it show up in your system like normal RAM and get to
>> it like a slow blob of memory? Well... have I got the
Keith Busch writes:
>> Keith, you seem to be implying that there are platforms that won't
>> support memory mode. Do you also have some insight into how customers
>> want to use this, beyond my speculation? It's really frustrating to see
>> patch sets like this go by without any real use cases
On Thu, Jan 17, 2019 at 12:20:06PM -0500, Jeff Moyer wrote:
> Keith Busch writes:
> > On Thu, Jan 17, 2019 at 11:29:10AM -0500, Jeff Moyer wrote:
> >> Dave Hansen writes:
> >> > Persistent memory is cool. But, currently, you have to rewrite
> >> > your applications to use it. Wouldn't it be
Keith Busch writes:
> On Thu, Jan 17, 2019 at 11:29:10AM -0500, Jeff Moyer wrote:
>> Dave Hansen writes:
>> > Persistent memory is cool. But, currently, you have to rewrite
>> > your applications to use it. Wouldn't it be cool if you could
>> > just have it show up in your system like normal
On Thu, Jan 17, 2019 at 8:29 AM Jeff Moyer wrote:
>
> Dave Hansen writes:
>
> > Persistent memory is cool. But, currently, you have to rewrite
> > your applications to use it. Wouldn't it be cool if you could
> > just have it show up in your system like normal RAM and get to
> > it like a slow
On Thu, Jan 17, 2019 at 11:29:10AM -0500, Jeff Moyer wrote:
> Dave Hansen writes:
> > Persistent memory is cool. But, currently, you have to rewrite
> > your applications to use it. Wouldn't it be cool if you could
> > just have it show up in your system like normal RAM and get to
> > it like a
Dave Hansen writes:
> Persistent memory is cool. But, currently, you have to rewrite
> your applications to use it. Wouldn't it be cool if you could
> just have it show up in your system like normal RAM and get to
> it like a slow blob of memory? Well... have I got the patch
> series for you!
I would like to get this queued up to get merged. Since most of the
churn is in the nvdimm code, and it also depends on some refactoring
that only exists in the nvdimm tree, it seems like putting it in *via*
the nvdimm tree is the best path.
But, this series makes non-trivial changes to the
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