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svcrdma: Increase the default connection credit limit
Reduce queuing on clients by allowing more credits by default. 64 is the default NFSv4.1 slot table size on Linux clients. This size prevents the credit limit from putting RPC requests to sleep again after they have already slept waiting for a session slot. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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1 changed files with 7 additions and 6 deletions
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@ -113,13 +113,14 @@ struct svcxprt_rdma {
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/* sc_flags */
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#define RDMAXPRT_CONN_PENDING 3
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#define RPCRDMA_LISTEN_BACKLOG 10
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#define RPCRDMA_MAX_REQUESTS 32
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/* Typical ULP usage of BC requests is NFSv4.1 backchannel. Our
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* current NFSv4.1 implementation supports one backchannel slot.
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/*
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* Default connection parameters
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*/
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#define RPCRDMA_MAX_BC_REQUESTS 2
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enum {
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RPCRDMA_LISTEN_BACKLOG = 10,
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RPCRDMA_MAX_REQUESTS = 64,
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RPCRDMA_MAX_BC_REQUESTS = 2,
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};
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#define RPCSVC_MAXPAYLOAD_RDMA RPCSVC_MAXPAYLOAD
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