diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2019-04-24 16:39:16 +0300 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2019-04-25 22:01:27 +0300 |
| commit | 8cec3dba76a4d9d7da4a7219663b8c4333f14522 (patch) | |
| tree | d31038bce86a37519387cb2eaff459b2ea0852ec /net/sunrpc/xprtrdma/xprt_rdma.h | |
| parent | 23146500b32fbee7eaa57c5002fcd64e5d9b32ca (diff) | |
| download | linux-8cec3dba76a4d9d7da4a7219663b8c4333f14522.tar.xz | |
xprtrdma: rpcrdma_regbuf alignment
Allocate the struct rpcrdma_regbuf separately from the I/O buffer
to better guarantee the alignment of the I/O buffer and eliminate
the wasted space between the rpcrdma_regbuf metadata and the buffer
itself.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/xprt_rdma.h')
| -rw-r--r-- | net/sunrpc/xprtrdma/xprt_rdma.h | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 539558fc9c62..1af9674572bd 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -121,33 +121,34 @@ struct rpcrdma_regbuf { struct ib_sge rg_iov; struct ib_device *rg_device; enum dma_data_direction rg_direction; - __be32 rg_base[0] __attribute__ ((aligned(256))); + void *rg_data; }; -static inline u64 -rdmab_addr(struct rpcrdma_regbuf *rb) +static inline u64 rdmab_addr(struct rpcrdma_regbuf *rb) { return rb->rg_iov.addr; } -static inline u32 -rdmab_length(struct rpcrdma_regbuf *rb) +static inline u32 rdmab_length(struct rpcrdma_regbuf *rb) { return rb->rg_iov.length; } -static inline u32 -rdmab_lkey(struct rpcrdma_regbuf *rb) +static inline u32 rdmab_lkey(struct rpcrdma_regbuf *rb) { return rb->rg_iov.lkey; } -static inline struct ib_device * -rdmab_device(struct rpcrdma_regbuf *rb) +static inline struct ib_device *rdmab_device(struct rpcrdma_regbuf *rb) { return rb->rg_device; } +static inline void *rdmab_data(const struct rpcrdma_regbuf *rb) +{ + return rb->rg_data; +} + #define RPCRDMA_DEF_GFP (GFP_NOIO | __GFP_NOWARN) /* To ensure a transport can always make forward progress, |