[Devel] [PATCH rh7 0/2] ploop: improve the performance of submit_alloc path

[Konstantin Khorenko]

Dima, please review.

--
Best regards,

Konstantin Khorenko,
Virtuozzo Linux Kernel Team

On 03/14/2016 12:10 AM, Maxim Patlasov wrote:
> Instead of using pagecache_write_begin/pagecache_write_end method, it is
> beneficial to preallocate space, then write data directly to block-device,
> then convert uninitialized extents (ext4) explicitly.
>
> The following series implements:
>   - a preparation patch replcacing BLOCK_UNINIT with em->uninit
>   - a patch implementing performance improvement
>
> https://jira.sw.ru/browse/PSBM-22381
>
> Signed-off-by: Maxim Patlasov <mpatlasov at virtuozzo.com>
> ---
>
> Maxim Patlasov (2):
>        ploop: replace BLOCK_UNINIT
>        ploop: use FALLOC_FL_CONVERT_UNWRITTEN in io_direct
>
>
>   drivers/block/ploop/dev.c           |    7 +++++
>   drivers/block/ploop/io_direct.c     |   52 ++++++++++++++++++++++++++++++-----
>   drivers/block/ploop/io_direct_map.c |    6 ++--
>   drivers/block/ploop/io_direct_map.h |    4 +--
>   include/linux/ploop/ploop.h         |    6 ++++
>   5 files changed, 62 insertions(+), 13 deletions(-)
>
> --
> Signature
>