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    SubjectRe: [RFC -mm 0/6] sysv ipc: scale msgmnb with the number of cpus wrote:
    > Humm... now this make me think that you did not change the MSGMNB
    > value when you changed MSGMNI and MSGMAX.
    > Maybe that was on purpose?
    I was afraid that it might break user space applications that queue a
    few kb of messages.
    That's also the reason for
    > if (msgsz + msq->q_cbytes <= msq->q_qbytes &&
    > 1 + msq->q_qnum <= msq->q_qbytes) {
    > break;
    > }
    It's possible to send 0-byte messages even if the message queue is full
    [except that you can't send more than MSGMNB messages].


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