From: "Loris Bennett" <loris.bennett@fu-berlin.de>
To: help-gnu-emacs@gnu.org
Subject: Re: It's almost 2016 and when (single-threaded) Emacs hangs, you gotta be smashing your keyboard!
Date: Fri, 20 Nov 2015 08:53:44 +0100 [thread overview]
Message-ID: <87fv0185tj.fsf@hornfels.zedat.fu-berlin.de> (raw)
In-Reply-To: mailman.285.1447979800.31583.help-gnu-emacs@gnu.org
Bob Proulx <bob@proulx.com> writes:
> Pascal J. Bourguignon wrote:
>> Alexander Shukaev writes:
>> > In this particular case, I'm talking about Linux and directories
>> > mounted from network.
>>
>> Yeah, right.
>>
>> This freezes unix, not emacs. You might prefer to access remote files
>> using tramp.
>
> I want to emphasize this. If you are accessing files over NFS and for
> whatever reason the NFS server goes away this causes the NFS client in
> the local kernel to wait. The "freeze" you are seeing is a freeze in
> the NFS client and not Emacs. The problem is in the kernel not emacs.
>
> NFS client is implemented in the kernel. When it locks up there is
> absolutely nothing an application can do to unlock the kernel. This
> has been a plague on NFS forever. Problems with the NFS client are
> the one thing that may require the workstation to be rebooted.
> Because if it were an application in userspace one could kill and
> restart it. But because NFS is implemented in the kernel the only way
> to kill and restart the kernel is to reboot.
>
> The only way to win is not to play. Which is what Pascal suggests
> with using emacs tramp to avoid nfs client and instead use ssh or
> other to access those files. Because tramp operates entirely in
> userspace it can't lock up the same way.
I mount remote directories via sshfs in my laptop so that I can access
them both via a terminal and within emacs. I experience hang-ups if
I switch my connection from ethernet to wireless, which changes the IP
address. I haven't noticed other programs having problems when the
network changes, but then again, I don't use that many other programs.
As I understand it, sshfs is also implemented in userspace, so is there
some other reason why tramp might be more robust with respect to changes
in the network configuration?
Cheers,
Loris
> Bob
>
> P.S. Emacs has been rock solid for me for the last decade. I can't
> remember the last time I experienced an emacs crash. Bugs in
> behavior? Sure. But no crashes.
--
This signature is currently under construction.
next prev parent reply other threads:[~2015-11-20 7:53 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-19 20:29 It's almost 2016 and when (single-threaded) Emacs hangs, you gotta be smashing your keyboard! Alexander Shukaev
2015-11-19 20:36 ` John Wiegley
2015-11-19 20:57 ` Alexander Shukaev
2015-11-19 21:15 ` Eli Zaretskii
2015-11-19 20:46 ` Eli Zaretskii
2015-11-19 20:55 ` Alexander Shukaev
2015-11-19 21:09 ` Eli Zaretskii
[not found] ` <mailman.264.1447966512.31583.help-gnu-emacs@gnu.org>
2015-11-19 21:11 ` Pascal J. Bourguignon
2015-11-20 0:36 ` Bob Proulx
2015-11-20 10:49 ` Rasmus
2015-11-22 21:43 ` Xavier Maillard
2015-11-22 22:24 ` Stefan Monnier
2015-11-23 5:11 ` Xavier Maillard
2015-11-23 3:34 ` Eli Zaretskii
2015-11-23 5:13 ` Xavier Maillard
2015-11-23 13:52 ` John Wiegley
2015-11-23 1:19 ` MBR
[not found] ` <mailman.285.1447979800.31583.help-gnu-emacs@gnu.org>
2015-11-20 7:53 ` Loris Bennett [this message]
2015-11-20 9:42 ` Michael Albinus
2015-11-19 21:25 ` Dmitry Gutov
2015-11-19 21:43 ` Random832
2015-11-19 22:18 ` Dmitry Gutov
2015-11-20 7:54 ` Eli Zaretskii
[not found] ` <mailman.262.1447966007.31583.help-gnu-emacs@gnu.org>
2015-11-23 0:12 ` Jason Rumney
[not found] <mailman.258.1447964949.31583.help-gnu-emacs@gnu.org>
2015-11-19 21:09 ` Pascal J. Bourguignon
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