Re: [PATCH v2 0/6] Reduce SMBDirect RDMA SGE counts and sizes

[Paulo Alcantara <pc@cjr.nz>]

Tom Talpey <tom@talpey.com> writes:

> Allocate fewer SGEs and standard packet sizes in both kernel SMBDirect
> implementations.
>
> The current maximum values (16 SGEs and 8192 bytes) cause failures on the
> SoftiWARP provider, and are suboptimal on others. Reduce these to 6 and
> 1364. Additionally, recode smbd_send() to work with as few as 2 SGEs,
> and for debug sanity, reformat client-side logging to more clearly show
> addresses, lengths and flags in the appropriate base.
>
> Tested over SoftiWARP and SoftRoCE with shell, Connectathon basic and general.
>
> v2: correct an uninitialized value issue found by Coverity
>
> Tom Talpey (6):
>   Decrease the number of SMB3 smbdirect client SGEs
>   Decrease the number of SMB3 smbdirect server SGEs
>   Reduce client smbdirect max receive segment size
>   Reduce server smbdirect max send/receive segment sizes
>   Handle variable number of SGEs in client smbdirect send.
>   Fix formatting of client smbdirect RDMA logging
>
>  fs/cifs/smbdirect.c       | 227 ++++++++++++++++----------------------
>  fs/cifs/smbdirect.h       |  14 ++-
>  fs/ksmbd/transport_rdma.c |   6 +-
>  3 files changed, 109 insertions(+), 138 deletions(-)

Acked-by: Paulo Alcantara (SUSE) <pc@cjr.nz>