NetBSD Problem Report #54103
From www@netbsd.org Sat Apr 6 14:19:25 2019
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Date: Sat, 6 Apr 2019 14:19:23 +0000 (UTC)
From: bernhard@netmuc.net
Reply-To: bernhard@netmuc.net
To: gnats-bugs@NetBSD.org
Subject: "rust never sleeps" wrong on one of my machines
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>Number: 54103
>Category: pkg
>Synopsis: "rust never sleeps" wrong on one of my machines
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: pkg-manager
>State: closed
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sat Apr 06 14:20:00 +0000 2019
>Closed-Date: Fri May 22 23:13:59 +0000 2020
>Last-Modified: Fri May 22 23:13:59 +0000 2020
>Originator: Bernhard Riedel
>Release: NetBSD-8.99.36/amd64 as of April 4, pkgsrc-2019Q1
>Organization:
>Environment:
NetBSD tja.crg.de 8.99.36 NetBSD 8.99.36 (GENERIC) #0: Wed Apr 3 18:57:32 CEST 2019 root@wip.crg.de:/sdata/test-current-20190403000000Z/obj/amd64/sys/arch/amd64/compile/GENERIC amd64
>Description:
Hi,
when building pkgsrc/lang/rust on one of my machines, I could observe
long pauses with load = 0.00, 0.00, 0.00 and rustc waiting:
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
3535 root 85 0 244M 71M 3535 7/9 0:00 0.00% 0.00% rustc
This could go on for quite some time, but I stumbled over a workaround.
Typing a few characters in an unused console or sshing in a few times
would end rustc's siesta.
Suspicion: rustc could be hungry for entropy and maybe uses /dev/random
instead of /dev/urandom.
Why am *I* seeing this? That box doesn't have any sdN or wdN, only an ld0
attached to nvme, and there is no mouse attached either.
As confirmed by 'rndctl -l', nvme/ld0 aren't used as entropy sources.
Cheers, Bernhard Riedel.
>How-To-Repeat:
See above. When trying to repeat, the pauses don't always happen for the same source files.
>Fix:
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback
State-Changed-By: nia@NetBSD.org
State-Changed-When: Sun, 07 Jul 2019 15:37:38 +0000
State-Changed-Why:
Should be fixed as of rust-1.35.0nb1 due to tnn's commit:
http://mail-index.netbsd.org/pkgsrc-changes/2019/06/13/msg193003.html
State-Changed-From-To: feedback->closed
State-Changed-By: maya@NetBSD.org
State-Changed-When: Fri, 22 May 2020 23:13:59 +0000
State-Changed-Why:
Closing as it's "double fixed". Even if rust had been reading /dev/random, the entropy depletion mechanism is gone as part of Riastradh's entropy rework, so it's not expected to block very many times.
>Unformatted:
(Contact us)
$NetBSD: query-full-pr,v 1.46 2020/01/03 16:35:01 leot Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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