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xprtrdma: Revert commit e7104a2a96 ('xprtrdma: Cap req_cqinit').

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The root of the problem was that sends (especially unsignalled
FASTREG and LOCAL_INV Work Requests) were not properly flow-
controlled, which allowed a send queue overrun.

Now that the RPC/RDMA reply handler waits for invalidation to
complete, the send queue is properly flow-controlled. Thus this
limit is no longer necessary.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever
2015-12-16 17:23:20 -05:00
committed by Anna Schumaker
parent 68791649a7
commit 26ae9d1c5a
2 changed files with 2 additions and 10 deletions
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6
net/sunrpc/xprtrdma/xprt_rdma.h
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@@ -88,12 +88,6 @@ struct rpcrdma_ep {
struct delayed_work rep_connect_worker;
};
/*
* Force a signaled SEND Work Request every so often,
* in case the provider needs to do some housekeeping.
*/
#define RPCRDMA_MAX_UNSIGNALED_SENDS (32)
#define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit)
#define DECR_CQCOUNT(ep) atomic_sub_return(1, &(ep)->rep_cqcount)