On 11/12/2013 09:45 AM, Junio C Hamano wrote:
> "H. Peter Anvin" <h...@zytor.com> writes:
>> On 11/10/2013 12:17 PM, Eric Wong wrote:
>>> "H. Peter Anvin" <h...@zytor.com> wrote:
>>>> When a remote server is unavailable or very slow, some git commands can
>>>> stall out indefinitely.  It would be a very good thing if remote
>>>> commands -- but especially git fetch -- could be given a timeout.
>>> We've had SO_KEEPALIVE on git and ssh transports since e47a8583 (2011-12-06)
>>> SO_KEEPALIVE for http was added recently (a15d069a) and will be in git 1.8.5
>>> Do you want a shorter timeout for slow (but still alive) servers?
>> Yes; note that SO_KEEPALIVE only guarantees that the server is alive at
>> the TCP socket level.  If the server is overloaded but technically alive
>> it may still make no meaningful forward progress.
> Which means that your original wish may not be granted with
> SO_KEEPALIVE at all, no?  I was wondering if you wanted a forced
> timeout based on alarm(2), something similar to what you added to
> git-daemon in 960deccb (git-daemon: timeout, eliminate double DWIM,
> 2005-10-19).

Yes, something more like that on the client end.  SO_KEEPALIVE is better
than nothing, but not really good enough.


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