[dm-devel] [PATCH v3 0/7] dax, pmem: Provide a dax operation to zero range of memory

[Vivek Goyal]

On Fri, Feb 07, 2020 at 03:26:45PM -0500, Vivek Goyal wrote:
> Hi,
> 
> This is V3 of patches. I have dropped RFC tag from the series as it
> looks like there is agreement on the interface. These patches are also
> available at.

Hi Dan, Christoph,

Ping for this patch series. How does it look? Do you have concerns?
If not, it will be good if this is merged.

Thanks
Vivek

> 
> https://github.com/rhvgoyal/linux/commits/dax-zero-range-v3
> 
> I posted previous versions here.
> 
> v2:
> https://lore.kernel.org/linux-fsdevel/20200203200029.4592-1-vgoyal@redhat.com/
> v1:
> https://lore.kernel.org/linux-fsdevel/20200123165249.GA7664@redhat.com/
> 
> Changes since V2:
> 
> Primarily took care of comments from Christoph.
> 
> - Changed zero_copy_range() parameters to pass dax device offset as u64.
> - Fixed comment which says current interface only supports zeroing
>   with-in page.
> - Refactored pmem_do_bvec() and reused write side of code in
>   zero_page_range().
> - Removed generic_dax_zero_page_range()
> - Fixed s390 dcssblk.c compilation issue.
> 
> Please review. 
> 
> Thanks
> Vivek
> 
> Vivek Goyal (7):
>   pmem: Add functions for reading/writing page to/from pmem
>   pmem: Enable pmem_do_write() to deal with arbitrary ranges
>   dax, pmem: Add a dax operation zero_page_range
>   s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver
>   dm,dax: Add dax zero_page_range operation
>   dax,iomap: Start using dax native zero_page_range()
>   dax,iomap: Add helper dax_iomap_zero() to zero a range
> 
>  drivers/dax/super.c           |  19 ++++++
>  drivers/md/dm-linear.c        |  21 +++++++
>  drivers/md/dm-log-writes.c    |  19 ++++++
>  drivers/md/dm-stripe.c        |  26 ++++++++
>  drivers/md/dm.c               |  31 ++++++++++
>  drivers/nvdimm/pmem.c         | 112 ++++++++++++++++++++++++----------
>  drivers/s390/block/dcssblk.c  |  17 ++++++
>  fs/dax.c                      |  53 ++++------------
>  fs/iomap/buffered-io.c        |   9 +--
>  include/linux/dax.h           |  20 ++----
>  include/linux/device-mapper.h |   3 +
>  11 files changed, 235 insertions(+), 95 deletions(-)
> 
> -- 
> 2.20.1
>