On Jul 10, 2015, at 11:54 AM, J. Bruce Fields <bfields@xxxxxxxxxxxx> wrote: > On Fri, Jul 10, 2015 at 10:59:48AM -0400, Chuck Lever wrote: >> >> On Jul 10, 2015, at 10:18 AM, bfields@xxxxxxxxxxxx wrote: >> >>> On Thu, Jul 09, 2015 at 04:45:47PM -0400, Chuck Lever wrote: >>>> Increased to 1 megabyte. >>> >>> Why not more or less? >>> >>> Why do we even have this constant, why shouldn't we just use >>> RPCSVC_MAXPAYLOAD? >> >> The payload size maximum for RDMA is based on RPCRDMA_MAX_SVC_SEGS. >> We could reverse the relationship and make RPCRDMA_MAX_SVC_SEGS >> based on RPCSVC_MAXPAYLOAD divided by the platform’s page size. > > But there'd be no reason to do that, because we're not using > RPCRDMA_MAX_SVC_SEGS anywhere. Should we be? Let me try using RPCSVC_MAXPAYLOAD. That is based on RPCSVC_MAXPAGES, which is actually used in svc_rdma_*.c > --b. > >> >> >>> --b. >>> >>>> >>>> Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx> >>>> --- >>>> >>>> include/linux/sunrpc/svc_rdma.h | 2 +- >>>> 1 files changed, 1 insertions(+), 1 deletions(-) >>>> >>>> diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h >>>> index 13af61b..1bca6dd 100644 >>>> --- a/include/linux/sunrpc/svc_rdma.h >>>> +++ b/include/linux/sunrpc/svc_rdma.h >>>> @@ -172,7 +172,7 @@ struct svcxprt_rdma { >>>> #define RDMAXPRT_SQ_PENDING 2 >>>> #define RDMAXPRT_CONN_PENDING 3 >>>> >>>> -#define RPCRDMA_MAX_SVC_SEGS (64) /* server max scatter/gather */ >>>> +#define RPCRDMA_MAX_SVC_SEGS (256) /* server max scatter/gather */ >>>> #if RPCSVC_MAXPAYLOAD < (RPCRDMA_MAX_SVC_SEGS << PAGE_SHIFT) >>>> #define RPCRDMA_MAXPAYLOAD RPCSVC_MAXPAYLOAD >>>> #else >>>> >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-nfs" in >>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> -- >> Chuck Lever >> >> -- Chuck Lever -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html