From: Richard Weinberger <richard@nod.at>
To: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>,
Thomas Meyer <thomas@m3y3r.de>
Cc: "user-mode-linux-devel@lists.sourceforge.net"
<user-mode-linux-devel@lists.sourceforge.net>
Subject: Re: [uml-devel] [PATCH v3] um: Switch clocksource to hrtimers
Date: Mon, 2 Nov 2015 11:01:19 +0100 [thread overview]
Message-ID: <5637346F.6060004@nod.at> (raw)
In-Reply-To: <563732B7.7050008@kot-begemot.co.uk>
Am 02.11.2015 um 10:53 schrieb Anton Ivanov:
> [snip]
>
>>>> I'm pretty sure that you don't see the issue as your Jessy userspace uses nanosleep periodically.
>>> There are quite a few things running so this may indeed be the case.
>>>
>>> What do you use for userspace (so I can try to reproduce this and debug it)?
>> Debian Squeeze amd64 with almost nothing running.
>>
>> PID TTY STAT TIME COMMAND
>> 2 ? S 0:00 [kthreadd]
>> 3 ? S 0:00 \_ [ksoftirqd/0]
>> 4 ? S 0:00 \_ [kworker/0:0]
>> 5 ? S< 0:00 \_ [kworker/0:0H]
>> 6 ? S 0:00 \_ [kworker/u2:0]
>> 7 ? S 0:00 \_ [kdevtmpfs]
>> 8 ? S< 0:00 \_ [netns]
>> 9 ? S< 0:00 \_ [writeback]
>> 10 ? S 0:00 \_ [kworker/u2:1]
>> 11 ? S< 0:00 \_ [crypto]
>> 12 ? S 0:00 \_ [kworker/0:1]
>> 13 ? S< 0:00 \_ [bioset]
>> 14 ? S< 0:00 \_ [kblockd]
>> 15 ? S 0:00 \_ [kswapd0]
>> 68 ? S 0:00 \_ [fsnotify_mark]
>> 221 ? S< 0:00 \_ [bioset]
>> 229 ? S< 0:00 \_ [deferwq]
>> 231 ? S 0:00 \_ [jbd2/ubda-8]
>> 232 ? S< 0:00 \_ [ext4-rsv-conver]
>> 233 ? S< 0:00 \_ [kworker/0:1H]
>> 1 ? Ss 0:00 init [2]
>> 271 ? S<s 0:00 udevd --daemon
>> 297 ? S< 0:00 \_ udevd --daemon
>> 298 ? S< 0:00 \_ udevd --daemon
>> 549 ? Sl 0:00 /usr/sbin/rsyslogd -c4
>> 580 ? Ss 0:00 /usr/sbin/cron
>> 595 ? Ss 0:00 /usr/bin/dbus-daemon --system
>> 609 ? Ss 0:00 /usr/sbin/sshd
>> 628 tty0 Ss 0:00 /bin/login --
>> 631 tty0 S 0:00 \_ -bash
>> 636 tty0 R+ 0:00 \_ ps fax
>> 629 tty1 Ss+ 0:00 /sbin/getty 38400 tty1 linux
>> 630 ttyS0 Ss+ 0:00 /sbin/getty 115200 ttyS0 linux
>
> I cannot reproduce that by dropping jessie into single user mode so I am going to build a squeeze image and re-test with that.
I can also reproduce using init=/bin/bash.
Thanks,
//richard
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next prev parent reply other threads:[~2015-11-02 10:01 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-21 8:42 [uml-devel] [PATCH v3] um: Switch clocksource to hrtimers Anton Ivanov
2015-10-25 18:46 ` Anton Ivanov
2015-10-26 10:12 ` Richard Weinberger
2015-10-29 6:23 ` Anton Ivanov
2015-10-31 13:54 ` Richard Weinberger
2015-10-31 15:10 ` Thomas Meyer
2015-10-31 15:13 ` Richard Weinberger
2015-10-31 15:16 ` Thomas Meyer
2015-10-31 15:21 ` Richard Weinberger
2015-10-31 15:24 ` Thomas Meyer
2015-10-31 15:30 ` Richard Weinberger
2015-10-31 15:44 ` Thomas Meyer
2015-10-31 16:22 ` Anton Ivanov
2015-10-31 19:08 ` Richard Weinberger
2015-10-31 20:17 ` Anton Ivanov
2015-10-31 19:06 ` Richard Weinberger
2015-11-02 8:14 ` Anton Ivanov
2015-11-02 8:37 ` Richard Weinberger
2015-11-02 8:41 ` Anton Ivanov
2015-11-02 8:52 ` Richard Weinberger
2015-11-02 8:57 ` Anton Ivanov
2015-11-02 9:12 ` Richard Weinberger
2015-11-02 9:53 ` Anton Ivanov
2015-11-02 10:01 ` Richard Weinberger [this message]
2015-11-02 10:59 ` Anton Ivanov
2015-11-02 11:00 ` Anton Ivanov
2015-11-02 14:30 ` Anton Ivanov
2015-11-02 15:25 ` Richard Weinberger
2015-11-02 16:19 ` Anton Ivanov
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