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Distributed computer system supporting remote interrupts and lock mechanism

  • US 6,170,025 B1
  • Filed: 08/11/1998
  • Issued: 01/02/2001
  • Est. Priority Date: 08/29/1997
  • Status: Expired due to Term
First Claim
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1. A method of executing a locked transaction over a distributed computer system to a remotely located I/O resource, the distributed computer system comprising a host computer and a remotely located I/O resource that is coupled to the host computer via a network, said method comprising the steps of:

  • detecting a locked host transaction on a host computer that is targeted to a remotely located I/O resource;

    wrapping the locked transaction in a packet for transmission over a network, the packet including a field indicating that the transaction is locked;

    transmitting the packet over the network to the remote I/O resource;

    unwrapping he packet received at the I/O resource;

    converting the locked host transaction to a locked I/O transaction;

    determining if the targeted resource is already locked by another host; and

    if the targeted I/O resource is not locked by another host computer, then replaying the locked transaction to the targeted I/O resource.

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