From: Michael Albinus <michael.albinus@gmx.de>
To: "João Távora" <joaotavora@gmail.com>
Cc: Thomas Koch <thomas@koch.ro>, eliz@gnu.org, 61350@debbugs.gnu.org
Subject: bug#61350: Eglot over Tramp freezes with large project
Date: Tue, 28 Feb 2023 13:59:19 +0100 [thread overview]
Message-ID: <87ilfmrlnc.fsf@gmx.de> (raw)
In-Reply-To: <871qmarplp.fsf@gmail.com> ("João Távora"'s message of "Tue, 28 Feb 2023 11:33:54 +0000")
João Távora <joaotavora@gmail.com> writes:
Hi João,
>>> ...is it though? :-) Can a feature that hangs when presented with more
>>> data than usual (however one defines that) be considered stable?
>> Tramp supports ControlMaster since Emacs 24. Eglot is the first case
>> I've heard of problems. I don't deny it
>
> That could be because, as far as I understand, Eglot is the first
> "major" package to use the transparent (make-process ... :file-handler
> t) which, AFAIU, means that Eglot's process, which doesn't really
> transmit _that_ much data, is piped transparently through Tramp's
> process managing the remote file whose buffer M-x eglot is executed in.
Eglot is not the first user of this. But Eglot sends a huge amount of
data over the wire, which seems to trigger the problem.
For example, lsp-mode uses start-file-process-shell-command, which calls
under the hood make-process similarly.
>>>> It is essential. I have been beaten by many Tramp users to support it.
>>> I'd say something "essential" is something you can't live without. But
>>> that doesn't seem to be the case here.
>> Ohh. You haven't seen how much Tramp has been blamed because it doesn't
>> support it out of the box.
>
> I understand, but it's the occasionally-exploding racecar all over
> again. I understand your reasoning: you're betting that it's acceptable
> for the ocassionally-exploded user to learn opt-out for a slightly
> slower car.
>
> The thing is they will probably blame the steering wheel, Eglot,
> because -- Tramp being "transparent" -- that's what they see.
>
> Ideally, we would just fix this. It would be nice to understand what
> actually happen and what information is lost, presumably to
> ControlMaster's gremlins. I think bringing in Eli's knowledge of
> process.c internals could be beneficial here.
I'm not against changing Tramp, really. But first I must understand
what's the problem, and why a change will solve it. Without other
collateral damages.
> Here are some questions. Apologies in advance if some of them are in
> the "FM".
The Tramp manual misses detailed implementation notes. On my TODO for
years, but it didn't happen until now.
> 1. When I open a single remote file on a remote host, I am creating
> Tramp process, I presume.
Yes. In Tramp slang, this is the (main) connection process.
> 2. If I kill this buffer and re-visit it, is the Tramp process re-used
> somehow or is a new one created?
The same connection process is used.
> 3. If I open another nearby file on the same host, I am sharing that
> Tramp process?
Yes, as long as the remote identification (method, user, host) are the
same.
> 4. What about in a different host?
A new connection process. Also if just the method or user
changes. "/ssh::" and "/scp::" use different connection processes.
> 5. Is there any way to get an overview of which Tramp processes are
> "responsible" for each set of remote files?
The so called connection buffers. This is always a buffer with the name
"*tramp/METHOD HOST*" or "*tramp/METHOD USER@HOST*", depending whether
there is a user name, or not. See function tramp-buffer-name. The Tramp
connection processes are bound to these buffers.
> 6. Now if I M-x eglot in a Tramp remote file that I had been working on
> Eglot-less for a while, is the Eglot process tunneled through the
> existing Tramp process, reusing it, or is a new one started?
It depends. A synchronous process, created by process-file, is tunnelled
through the connection process. An asynchronous process, created by
make-process or start-file-process, is a new one.
> 7. If an existing process is reused, is there any way to force Tramp to
> open a new one, perhaps with slightly different configuration
> options?
No need for synchronous processes. And for asynchronous processes, they
have their own process. If configuration options are changed prior the
make-process call, they apply.
> João
Best regards, Michael.
next prev parent reply other threads:[~2023-02-28 12:59 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-07 16:33 bug#61350: Eglot over Tramp freezes with large project Thomas Koch
2023-02-17 9:54 ` Michael Albinus
2023-02-17 10:33 ` Thomas Koch
2023-02-18 11:10 ` Thomas Koch
2023-02-18 12:07 ` Michael Albinus
2023-02-23 11:55 ` Thomas Koch
2023-02-25 14:36 ` Michael Albinus
2023-02-23 12:17 ` João Távora
2023-02-23 14:18 ` João Távora
2023-02-23 14:47 ` Thomas Koch
2023-02-23 15:22 ` João Távora
2023-02-24 17:19 ` Michael Albinus
2023-02-24 17:45 ` João Távora
2023-02-25 14:27 ` Michael Albinus
2023-02-25 23:09 ` João Távora
2023-02-26 10:24 ` Thomas Koch
2023-02-26 15:58 ` Michael Albinus
2023-02-26 17:23 ` Michael Albinus
2023-02-26 21:13 ` João Távora
2023-02-26 21:45 ` João Távora
2023-02-27 7:53 ` Michael Albinus
2023-02-27 9:42 ` João Távora
2023-02-27 20:11 ` Michael Albinus
2023-02-27 7:47 ` Michael Albinus
2023-02-27 9:35 ` João Távora
2023-02-27 20:10 ` Michael Albinus
2023-02-28 0:10 ` João Távora
2023-02-28 10:38 ` Michael Albinus
2023-02-28 11:33 ` João Távora
2023-02-28 12:59 ` Michael Albinus [this message]
2023-02-28 14:41 ` João Távora
2023-02-28 14:18 ` Michael Albinus
2023-02-28 14:51 ` João Távora
2023-02-28 15:01 ` Michael Albinus
2023-02-28 17:55 ` Thomas Koch
2023-03-01 14:10 ` João Távora
2023-03-01 16:19 ` João Távora
2023-03-02 11:01 ` Michael Albinus
2023-03-02 11:22 ` João Távora
2023-03-02 11:50 ` Michael Albinus
2023-03-05 11:21 ` Michael Albinus
2023-03-05 11:45 ` Thomas Koch
2023-03-05 12:23 ` Michael Albinus
2023-03-07 12:49 ` Michael Albinus
2023-03-07 13:04 ` Thomas Koch
2023-03-07 13:33 ` João Távora
2023-03-07 13:52 ` Michael Albinus
2023-03-07 14:03 ` João Távora
2023-03-07 14:31 ` Michael Albinus
2023-03-11 9:00 ` Michael Albinus
2023-03-11 10:14 ` Thomas Koch
2023-03-11 11:47 ` João Távora
2023-03-11 12:27 ` Michael Albinus
2023-03-11 11:42 ` João Távora
2023-03-11 12:44 ` Michael Albinus
2023-03-11 14:01 ` João Távora
2023-03-11 14:25 ` Michael Albinus
2023-03-12 0:48 ` João Távora
2023-03-12 10:22 ` Michael Albinus
2023-03-14 11:01 ` Michael Albinus
2023-03-14 15:00 ` Michael Albinus
2023-03-14 15:19 ` João Távora
2023-03-14 15:42 ` Michael Albinus
2023-03-15 17:47 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-15 18:05 ` João Távora
2023-03-15 18:30 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-15 19:44 ` João Távora
2023-03-15 20:14 ` João Távora
2023-03-15 21:34 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-15 21:55 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-16 13:28 ` João Távora
2023-03-18 12:34 ` Michael Albinus
2023-03-15 21:43 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-15 21:49 ` João Távora
2023-03-16 6:24 ` Jim Porter
2023-03-16 13:25 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-16 13:28 ` João Távora
2023-03-16 15:58 ` João Távora
2023-03-16 20:36 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-16 22:04 ` João Távora
2023-03-07 13:47 ` Michael Albinus
2023-03-06 12:42 ` Michael Albinus
2023-03-06 13:45 ` João Távora
2023-03-06 13:42 ` João Távora
2023-03-02 10:40 ` Michael Albinus
2023-02-28 19:37 ` João Távora
2023-03-01 8:44 ` Michael Albinus
2023-03-01 11:15 ` João Távora
2023-03-01 10:46 ` Gregory Heytings
2023-03-01 11:08 ` João Távora
2023-03-01 11:23 ` Gregory Heytings
2023-03-01 11:37 ` João Távora
2023-03-01 14:51 ` Michael Albinus
2023-03-01 15:02 ` Gregory Heytings
2023-04-24 1:44 ` Aaron Madlon-Kay
2023-05-05 11:32 ` Michael Albinus
2023-05-05 13:14 ` Ruijie Yu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-05-05 14:53 ` Michael Albinus
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