[dm-devel] [PATCH v5 0/3] Fix DM DAX handling
Dan Williams
dan.j.williams at intel.com
Tue Jun 26 22:37:51 UTC 2018
On Tue, Jun 26, 2018 at 3:30 PM, Ross Zwisler
<ross.zwisler at linux.intel.com> wrote:
> This series fixes a few issues that I found with DM's handling of DAX
> devices. Here are some of the issues I found:
>
> * We can create a dm-stripe or dm-linear device which is made up of an
> fsdax PMEM namespace and a raw PMEM namespace but which can hold a
> filesystem mounted with the -o dax mount option. DAX operations to
> the raw PMEM namespace part lack struct page and can fail in
> interesting/unexpected ways when doing things like fork(), examining
> memory with gdb, etc.
>
> * We can create a dm-stripe or dm-linear device which is made up of an
> fsdax PMEM namespace and a BRD ramdisk which can hold a filesystem
> mounted with the -o dax mount option. All I/O to this filesystem
> will fail.
>
For the series:
Acked-by: Dan Williams <dan.j.williams at intel.com>
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