Re: [PATCH v7 09/12] mm/sparsemem: Support sub-section hotplug

2019-06-03 Thread Dan Williams
On Fri, May 3, 2019 at 5:56 AM Oscar Salvador wrote: > > On Wed, May 01, 2019 at 10:56:10PM -0700, Dan Williams wrote: > > The libnvdimm sub-system has suffered a series of hacks and broken > > workarounds for the memory-hotplug implementation's awkward > > section-aligned (128MB) granularity.

Re: [PATCH v7 09/12] mm/sparsemem: Support sub-section hotplug

2019-05-03 Thread Oscar Salvador
On Wed, May 01, 2019 at 10:56:10PM -0700, Dan Williams wrote: > The libnvdimm sub-system has suffered a series of hacks and broken > workarounds for the memory-hotplug implementation's awkward > section-aligned (128MB) granularity. For example the following backtrace > is emitted when attempting

[PATCH v7 09/12] mm/sparsemem: Support sub-section hotplug

2019-05-02 Thread Dan Williams
The libnvdimm sub-system has suffered a series of hacks and broken workarounds for the memory-hotplug implementation's awkward section-aligned (128MB) granularity. For example the following backtrace is emitted when attempting arch_add_memory() with physical address ranges that intersect 'System