From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Jason Rumney <jasonr@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Reviving Gnus after suspend/hibernation
Date: Sat, 29 Oct 2011 12:13:04 -0400 [thread overview]
Message-ID: <jwv8vo3rdgy.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <87mxcksc87.fsf@gnu.org> (Jason Rumney's message of "Sat, 29 Oct 2011 11:33:44 +0800")
>> The Linux kernel definitely does not (and barring a NAT router, or
>> a resume with a different IP, or attempted communication on the link
>> while you're sleeping, the TCP connection will be faithfully waiting
>> for us when we resume).
> The other end will close it after a timeout. Usually 5 minutes.
I can assure you that I've seen TCP connections without any packet
exchanged for a lot more than 5 minutes. And indeed most NAT routers
wait longer than 5 minutes before considering a TCP connection as dead.
The timeout you're talking about only exists if the connection uses the
`tcp keepalive' feature (and yes, we want to use the tcp keepalive on
those connections, and I added code for that).
> But this isn't the problem I've experienced with Gnus after
> suspend/resume. Gnus apparently knows the socket is closed, as it
> very quickly reports the connection failure and starts working in
> offline mode. What is missing is the ability to automatically reconnect
> and continue, without going back to the Groups buffer and pressing M-g
> (which inhibits the offline mode, as opposed to g, which doesn't).
That's another issue ... ah yes: bug#9244
Stefan
next prev parent reply other threads:[~2011-10-29 16:13 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87wrc2qmog.fsf@gnu.org>
[not found] ` <877h3ule0y.fsf@lifelogs.com>
2011-10-27 17:41 ` Reviving Gnus after suspend/hibernation Ted Zlatanov
2011-10-27 18:14 ` Eli Zaretskii
2011-10-27 18:37 ` Ted Zlatanov
2011-10-27 18:48 ` Eli Zaretskii
2011-10-27 19:07 ` Ted Zlatanov
2011-10-27 23:48 ` Richard Stallman
2011-10-28 0:17 ` Ted Zlatanov
2011-10-27 18:50 ` joakim
2011-10-27 21:12 ` Stefan Monnier
2011-10-27 21:32 ` Ted Zlatanov
2011-10-28 0:33 ` Stefan Monnier
2011-10-28 20:31 ` Ted Zlatanov
2011-10-29 0:50 ` Stefan Monnier
2011-10-29 3:33 ` Jason Rumney
2011-10-29 16:13 ` Stefan Monnier [this message]
2011-10-29 18:35 ` Ted Zlatanov
2011-10-29 19:44 ` Stefan Monnier
2011-11-03 20:24 ` Lars Magne Ingebrigtsen
2011-11-03 21:12 ` Stefan Monnier
2011-11-03 21:25 ` Lars Magne Ingebrigtsen
2011-10-29 18:31 ` Ted Zlatanov
2011-10-29 19:07 ` Antoine Levitt
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