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bug#41948: Shepherd deadlocks
From: |
Michael Rohleder |
Subject: |
bug#41948: Shepherd deadlocks |
Date: |
Sat, 20 Jun 2020 02:16:25 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Hi Mathieu,
Mathieu Othacehe <othacehe@gnu.org> writes:
> This is not always reproducible. In order to gather some information, I
> created a Shepherd "strace" service that logs what's happening in
> Shepherd itself (patch attached).
> +(define strace-service-type
> + (shepherd-service-type
> + 'strace
> + (lambda (pid)
> + (shepherd-service
> + (requirement '(root-file-system user-processes))
> + (provision (list (string->symbol
> + (string-append "strace-" (number->string pid)))))
> + (documentation "Strace a running process.")
> + (start #~(make-forkexec-constructor
> + (list #$(file-append strace "/bin/strace")
> + "-f" "-p" (number->string #$pid)
> + "-o" (string-append "/var/log/strace-"
> + (number->string #$pid) ".log"))))
> + (stop #~(make-kill-destructor))))))
Thank you very much for this nice strace service!
I'am debugging a "shepherd hangs" problem in the context of lvm and
lvmcache...
This service helps me a lot, ty!
--
>Ever heard of .cshrc?
That's a city in Bosnia. Right?
(Discussion in comp.os.linux.misc on the intuitiveness of commands.)
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