Re: [PATCH v2 0/6] mm/devm_memremap_pages: Fix page release race

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On 5/13/2019 12:22 PM, Logan Gunthorpe wrote:


On 2019-05-08 11:05 a.m., Logan Gunthorpe wrote:

On 2019-05-07 5:55 p.m., Dan Williams wrote:
Changes since v1 [1]:
- Fix a NULL-pointer deref crash in pci_p2pdma_release() (Logan)

- Refresh the p2pdma patch headers to match the format of other p2pdma
   patches (Bjorn)

- Collect Ira's reviewed-by

[1]: https://lore.kernel.org/lkml/155387324370.2443841.574715745262628837.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
This series looks good to me:

Reviewed-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>

However, I haven't tested it yet but I intend to later this week.
I've tested libnvdimm-pending which includes this series on my setup and
everything works great.
Just wondering in a difference scenario where pmem pages are exported to
a KVM guest, and then by mistake the user issues "ndctl destroy-namespace -f",
will the kernel wait indefinitely until the user figures out to kill the guest
and release the pmem pages?

thanks,
-jane
 

Thanks,

Logan
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