Re: [PATCH v2 06/10] xprtrdma: Enable pad optimization

[Anna Schumaker <Anna.Schumaker-HgOvQuBEEgTQT0dZR+AlfA@public.gmane.org>]

Hey Chuck,


On 11/08/2014 08:14 PM, Chuck Lever wrote:
> The Linux NFS/RDMA server used to reject NFSv3 WRITE requests when
> pad optimization was enabled. That bug was fixed by commit
> e560e3b510d2 ("svcrdma: Add zero padding if the client doesn't send
> it").

Do we need to worry about backwards compatibility with servers that don't have this patch?

Anna

>
> We can now enable pad optimization on the client, which helps
> performance and is supported now by both Linux and Solaris servers.
>
> Signed-off-by: Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
> ---
>  net/sunrpc/xprtrdma/transport.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
> index cfe9a81..8ed2576 100644
> --- a/net/sunrpc/xprtrdma/transport.c
> +++ b/net/sunrpc/xprtrdma/transport.c
> @@ -73,7 +73,7 @@ static unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
>  static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
>  static unsigned int xprt_rdma_inline_write_padding;
>  static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR;
> -                int xprt_rdma_pad_optimize = 0;
> +		int xprt_rdma_pad_optimize = 1;
>  
>  #ifdef RPC_DEBUG
>  
>
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