Re: sendfile(2) SF_NOPUSH flag proposal

From: Terry Lambert (tlambert2_at_mindspring.com)
Date: 05/29/03

  • Next message: Terry Lambert: "Re: sendfile(2) SF_NOPUSH flag proposal" 
    Date: Thu, 29 May 2003 08:36:59 -0700
To: Igor Sysoev <is@rambler-co.ru>

    Igor Sysoev wrote:
    > On Wed, 28 May 2003, Terry Lambert wrote:
    > > Igor Sysoev wrote:
    > > > > will result in you sleeping with PRUS_MORETOCOME set, but with
    > > > > no more being sent because the send buffer doesn't get emptied,
    > > > > as it's waiting for more data to send.
    > > >
    > > > But as I understand PRUS_MORETOCOME is not set if socket is non-blocking.
    > >
    > > Then the bug is still not fixed by setting it, since your total
    > > send size might be less than `sysctl net.inet.tcp.sendspace`.
    >
    > Why ? We can reset TF_MORETOCOME if the sending is completed.

    It's called a "deadly embrace" deadlock. Look it up.

    -- Terry
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