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xprtrdma: Chain together all MWs in same buffer pool 

During connection loss recovery, need to visit every MW in a
buffer pool. Any MW that is in use by an RPC will not be on the
rb_mws list.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Shirley Ma <shirley.ma@oracle.com>
Tested-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2014-07-29 17:24:28 -04:00 committed by Anna Schumaker
parent c93e986a29
commit 3111d72c7c
2 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
net/sunrpc/xprtrdma/verbs.c
View File

@ -1074,6 +1074,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
p += cdata->padding;
INIT_LIST_HEAD(&buf->rb_mws);
INIT_LIST_HEAD(&buf->rb_all);
r = (struct rpcrdma_mw *)p;
switch (ia->ri_memreg_strategy) {
case RPCRDMA_FRMR:
@ -1098,6 +1099,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
ib_dereg_mr(r->r.frmr.fr_mr);
goto out;
}
list_add(&r->mw_all, &buf->rb_all);
list_add(&r->mw_list, &buf->rb_mws);
++r;
}
@ -1116,6 +1118,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
" failed %i\n", __func__, rc);
goto out;
}
list_add(&r->mw_all, &buf->rb_all);
list_add(&r->mw_list, &buf->rb_mws);
++r;
}
@ -1225,6 +1228,7 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
while (!list_empty(&buf->rb_mws)) {
r = list_entry(buf->rb_mws.next,
struct rpcrdma_mw, mw_list);
list_del(&r->mw_all);
list_del(&r->mw_list);
switch (ia->ri_memreg_strategy) {
case RPCRDMA_FRMR:

4
net/sunrpc/xprtrdma/xprt_rdma.h
View File

@ -151,7 +151,7 @@ struct rpcrdma_rep {
* An external memory region is any buffer or page that is registered
* on the fly (ie, not pre-registered).
*
* Each rpcrdma_buffer has a list of these anchored in rb_mws. During
* Each rpcrdma_buffer has a list of free MWs anchored in rb_mws. During
* call_allocate, rpcrdma_buffer_get() assigns one to each segment in
* an rpcrdma_req. Then rpcrdma_register_external() grabs these to keep
* track of registration metadata while each RPC is pending.
@ -175,6 +175,7 @@ struct rpcrdma_mw {
struct rpcrdma_frmr frmr;
} r;
struct list_head mw_list;
struct list_head mw_all;
};
/*
@ -246,6 +247,7 @@ struct rpcrdma_buffer {
atomic_t rb_credits; /* most recent server credits */
int rb_max_requests;/* client max requests */
struct list_head rb_mws; /* optional memory windows/fmrs/frmrs */
struct list_head rb_all;
int rb_send_index;
struct rpcrdma_req **rb_send_bufs;
int rb_recv_index;