On Sun, 12 Feb 2017 17:35:00 -0800 Dan Williams wrote:
> On Sun, Feb 12, 2017 at 5:25 PM, Masayoshi Mizuma
> wrote:
> > Hi Dan,
> >
> > On Sun, 12 Feb 2017 14:34:11 -0800 Dan Williams wrote:
> >>
> >> Ben notes that commit f931ab479dd2 "mm: fix devm_memremap_pages crash,
> >> use mem_hotplug_{be
Hi Dan,
On Sun, 12 Feb 2017 14:34:11 -0800 Dan Williams wrote:
Ben notes that commit f931ab479dd2 "mm: fix devm_memremap_pages crash,
use mem_hotplug_{begin, done}" is incomplete and broken. Writes to
mem_hotplug.active_writer need to be coordinated under the device
hotplug lock. Otherwise, we c
On Sun, Feb 12, 2017 at 5:25 PM, Masayoshi Mizuma
wrote:
> Hi Dan,
>
> On Sun, 12 Feb 2017 14:34:11 -0800 Dan Williams wrote:
>>
>> Ben notes that commit f931ab479dd2 "mm: fix devm_memremap_pages crash,
>> use mem_hotplug_{begin, done}" is incomplete and broken. Writes to
>> mem_hotplug.active_wri
Ben notes that commit f931ab479dd2 "mm: fix devm_memremap_pages crash,
use mem_hotplug_{begin, done}" is incomplete and broken. Writes to
mem_hotplug.active_writer need to be coordinated under the device
hotplug lock. Otherwise, we can potentially corrupt mem_hotplug.refcount
leading to soft lockup
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