From: Michael Albinus via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Suhail Singh <suhailsingh247@gmail.com>, 73046@debbugs.gnu.org
Subject: bug#73046: 29.4; Emacs 100% CPU usage for several seconds when opening dired buffer over TRAMP
Date: Wed, 11 Sep 2024 16:06:46 +0200 [thread overview]
Message-ID: <877cbiffnt.fsf@gmx.de> (raw)
In-Reply-To: <87bk0zjzt1.fsf@gmx.de> (Michael Albinus's message of "Sat, 07 Sep 2024 16:36:42 +0200")
Michael Albinus <michael.albinus@gmx.de> writes:
Hi Eli,
> I made a test. In a remote directory I have created a cyclic symlink
> "zzz", in order to see what Tramp does when running dired on the
> directory. The additional actions are
[...]
> 15 times the "test -h" command - I guess, Tramp shall do cyclic link
> detection better.
I've analyzed the case in detail. Tracing file-truename and
tramp-sh-handle-file-truename.
--8<---------------cut here---------------start------------->8---
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
======================================================================
1 -> (file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 -> (tramp-sh-handle-file-truename "/ssh:gandalf:~/tmp/zzz")
| 2 <- tramp-sh-handle-file-truename: !non-local\ exit!
1 <- file-truename: !non-local\ exit!
--8<---------------cut here---------------end--------------->8---
15 calls of file-truename (dired fontification), with 1 call of
tramp-sh-handle-file-truename each time. That sounds proper.
Tramp doesn't cache erroneous results, so it doesn't remember the
truename of "/ssh:gandalf:~/tmp/zzz". That's it, we can live with it I
guess.
Best regards, Michael.
next prev parent reply other threads:[~2024-09-11 14:06 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-05 14:24 bug#73046: 29.4; Emacs 100% CPU usage for several seconds when opening dired buffer over TRAMP Suhail Singh
2024-09-05 15:56 ` Eli Zaretskii
2024-09-05 21:04 ` Suhail Singh
2024-09-06 5:40 ` Eli Zaretskii
2024-09-06 13:23 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-06 13:54 ` Eli Zaretskii
2024-09-06 14:09 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-06 16:09 ` Eli Zaretskii
2024-09-06 17:47 ` Suhail Singh
2024-09-06 19:08 ` Eli Zaretskii
2024-09-07 0:19 ` Suhail Singh
2024-09-07 1:39 ` Suhail Singh
2024-09-07 6:29 ` Eli Zaretskii
2024-09-07 8:07 ` Suhail Singh
2024-09-07 14:36 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-07 15:07 ` Eli Zaretskii
2024-09-07 17:35 ` Suhail Singh
2024-09-08 11:30 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-08 11:47 ` Eli Zaretskii
2024-09-08 15:26 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-08 15:41 ` Eli Zaretskii
2024-09-08 16:46 ` Suhail Singh
2024-09-08 17:53 ` Eli Zaretskii
2024-09-10 8:10 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-11 1:05 ` Suhail Singh
2024-09-11 11:50 ` Eli Zaretskii
2024-09-11 16:29 ` Suhail Singh
2024-09-11 16:38 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-11 17:25 ` Suhail Singh
2024-09-12 11:48 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-11 14:13 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-11 15:56 ` Suhail Singh
2024-09-13 23:17 ` Suhail Singh
2024-09-14 6:24 ` Eli Zaretskii
2024-09-14 14:25 ` Suhail Singh
2024-09-14 14:41 ` Suhail Singh
2024-09-14 15:03 ` Eli Zaretskii
2024-09-14 22:36 ` Suhail Singh
2024-09-15 5:55 ` Eli Zaretskii
2024-09-15 14:23 ` Suhail Singh
2024-09-20 9:54 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-20 10:47 ` Eli Zaretskii
2024-09-20 14:18 ` Suhail Singh
2024-09-20 15:35 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-20 15:42 ` Suhail Singh
2024-09-21 8:30 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-21 14:06 ` Suhail Singh
2024-09-14 7:07 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-14 14:39 ` Suhail Singh
2024-09-20 8:48 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-11 14:06 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2024-09-07 14:22 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-07 17:58 ` Suhail Singh
2024-09-08 11:26 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-08 15:09 ` Suhail Singh
2024-09-08 15:19 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-08 15:34 ` Suhail Singh
2024-09-08 16:35 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-11 16:19 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-06 16:56 ` Suhail Singh
2024-09-06 16:01 ` Suhail Singh
2024-09-06 15:46 ` Suhail Singh
2024-09-06 15:52 ` Suhail Singh
[not found] <87v7yz1sw8.fsf@rutgers.edu>
2024-09-13 15:47 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-20 16:05 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-20 17:11 ` Jake Nelson via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-21 6:59 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
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