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| author | Chuck Lever <chuck.lever@oracle.com> | 2015-05-26 11:53:23 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2015-06-12 13:10:37 -0400 |
| commit | acb9da7a57d7905c46d0b69d30fcf944eae261de (patch) | |
| tree | 22fe11a9f29010a5d822c1cb7f455ed25d761ec9 /net/sunrpc/xprtrdma/xprt_rdma.h | |
| parent | 58d1dcf5a8ebb0ce8a521286a99efdd636012bf0 (diff) | |
| download | lwn-acb9da7a57d7905c46d0b69d30fcf944eae261de.tar.gz lwn-acb9da7a57d7905c46d0b69d30fcf944eae261de.zip | |
xprtrdma: Stack relief in fmr_op_map()
fmr_op_map() declares a 64 element array of u64 in automatic
storage. This is 512 bytes (8 * 64) on the stack.
Instead, when FMR memory registration is in use, pre-allocate a
physaddr array for each rpcrdma_mw.
This is a pre-requisite for increasing the r/wsize maximum for
FMR on platforms with 4KB pages.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Devesh Sharma <devesh.sharma@avagotech.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.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 | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index df92884400c4..110d685b4ac5 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -206,9 +206,14 @@ struct rpcrdma_frmr { struct rpcrdma_xprt *fr_xprt; }; +struct rpcrdma_fmr { + struct ib_fmr *fmr; + u64 *physaddrs; +}; + struct rpcrdma_mw { union { - struct ib_fmr *fmr; + struct rpcrdma_fmr fmr; struct rpcrdma_frmr frmr; } r; void (*mw_sendcompletion)(struct ib_wc *); |