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    SubjectRe: [PATCH net] tcp: make TCP_USER_TIMEOUT accurate for zero window probes
    Hi, Jakub:

    On Fri, Jan 22, 2021 at 06:34:24PM -0800, Jakub Kicinski wrote:
    > On Fri, 22 Jan 2021 18:28:23 -0800 Enke Chen wrote:
    > > Hi, Jakub:
    > >
    > > In terms of backporting, this patch should go together with:
    > >
    > > 9d9b1ee0b2d1 tcp: fix TCP_USER_TIMEOUT with zero window
    >
    > As in it:
    >
    > Fixes: 9d9b1ee0b2d1 tcp: fix TCP_USER_TIMEOUT with zero window
    >
    > or does it further fix the same issue, so:
    >
    > Fixes: 9721e709fa68 ("tcp: simplify window probe aborting on USER_TIMEOUT")
    >
    > ?

    Let me clarify:

    1) 9d9b1ee0b2d1 tcp: fix TCP_USER_TIMEOUT with zero window

    fixes the bug and makes it work.

    2) The current patch makes the TCP_USER_TIMEOUT accurate for 0-window probes.
    It's independent.

    With 1) and 2), the known issues with TCP_USER_TIMEOUT for 0-window probes
    would be resolved.

    Thanks. -- Enke



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