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461862ef94
NX uses credit mechanism to control the number of requests issued on a specific window at any point of time. Only send windows and fault window are used credits. When the request is issued on a given window, a credit is taken. This credit will be returned after that request is processed. If credits are not available, returns RMA_Busy for send window and RMA_Reject for fault window. NX expects OS to return credit for send window after processing fault CRB. Also credit has to be returned for fault window after handling the fault. Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Haren Myneni <haren@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1587017059.2275.1064.camel@hbabu-laptop |
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