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Commit 32e6b681 authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
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xprtrdma: Avoid Receive Queue wrapping



Commit e340c2d6 ("xprtrdma: Reduce the doorbell rate (Receive)")
increased the number of Receive WRs that are posted by the client,
but did not increase the size of the Receive Queue allocated during
transport set-up.

This is usually not an issue because RPCRDMA_BACKWARD_WRS is defined
as (32) when SUNRPC_BACKCHANNEL is defined. In cases where it isn't,
there is a real risk of Receive Queue wrapping.

Fixes: e340c2d6 ("xprtrdma: Reduce the doorbell rate (Receive)")
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Reviewed-by: default avatarTom Talpey <tom@talpey.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent d99f2487
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