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authorTom Tucker <tom@opengridcomputing.com>2008-04-30 19:50:56 -0500
committerTom Tucker <tom@opengridcomputing.com>2008-05-19 07:33:51 -0500
commit02e7452de74d308ca642f54f7e5ef801ced60a92 (patch)
tree9300b5d12be31a6d48689a4260abb1b81e8a5551 /include/linux/sunrpc
parent10a38c33f46d128d11e299acba744bc325cde420 (diff)
svcrdma: Simplify RDMA_READ deferral buffer management
An NFS_WRITE requires a set of RDMA_READ requests to fetch the write data from the client. There are two principal pieces of data that need to be tracked: the list of pages that comprise the completed RPC and the SGE of dma mapped pages to refer to this list of pages. Previously this whole bit was managed as a linked list of contexts with the context containing the page list buried in this list. This patch simplifies this processing by not keeping a linked list, but rather only a pionter from the last submitted RDMA_READ's context to the context that maps the set of pages that describe the RPC. This significantly simplifies this code path. SGE contexts are cleaned up inline in the DTO path instead of at read completion time. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Diffstat (limited to 'include/linux/sunrpc')
-rw-r--r--include/linux/sunrpc/svc_rdma.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index d0011f3db90..c447c417b37 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -71,6 +71,7 @@ extern atomic_t rdma_stat_sq_prod;
* completes.
*/
struct svc_rdma_op_ctxt {
+ struct svc_rdma_op_ctxt *read_hdr;
struct svc_rdma_op_ctxt *next;
struct xdr_buf arg;
struct list_head dto_q;