RE: [PATCH v1 2/3] megaraid_sas: iouring iopoll support

[Kashyap Desai <kashyap.desai@broadcom.com>]

[-- Attachment #1: Type: text/plain, Size: 1369 bytes --]

> Add support of iouring iopoll interface. This feature requires shared
hosttag
> support in kernel and driver.
>
> Driver will work in non-IRQ mode = There will not be any msix vector
> associated for poll_queues and h/w can still work in this mode.
> MegaRaid h/w is single submission queue and multiple reply queue, but
using
> shared host tagset support it will enable simulated multiple hw queue.
>
> Driver allocates some extra reply queues and it will be marked as
poll_queue.
> These poll_queues will not have associated msix vectors. All the IO
> completion on this queue will be done from IOPOLL interface.
>
> megaraid_sas driver having 8 poll_queues and using io_uring hiprio=1
> settings, It can reach 3.2M IOPs and there is zero interrupt generated
by h/w.
>
> This feature can be enabled using module parameter poll_queues.
>
> Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
> Cc: sumit.saxena@broadcom.com
> Cc: chandrakanth.patil@broadcom.com
> Cc: linux-block@vger.kernel.org
>
> ---
>  drivers/scsi/megaraid/megaraid_sas.h        |  2 +
>  drivers/scsi/megaraid/megaraid_sas_base.c   | 90 ++++++++++++++++++---
>  drivers/scsi/megaraid/megaraid_sas_fusion.c | 43 +++++++++-
> drivers/scsi/megaraid/megaraid_sas_fusion.h |  3 +
>  4 files changed, 127 insertions(+), 11 deletions(-)
>

Is there  any feedback/comment on this patch series ?

[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4169 bytes --]