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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: ddu <dengke.du@windriver.com>
Cc: linux-rt-users@vger.kernel.org
Subject: Re: rt kernel break printf command's parent process
Date: Tue, 28 May 2019 16:33:29 +0200	[thread overview]
Message-ID: <20190528143329.yxpzhu2ov5piiceb@linutronix.de> (raw)
In-Reply-To: <205dd879-fedc-2edf-92b3-0bd8a3ee1870@windriver.com>

On 2019-05-27 17:47:04 [+0800], ddu wrote:
> Hi all
Hi,

> I use yocto rt-kernel which rebase on rt kernel:
> 
> http://git.yoctoproject.org/cgit/cgit.cgi/linux-yocto/log/?h=v5.0/standard/preempt-rt/intel-x86
> 
> yocto branch: master
> 
> run command:
> 
> printf "%0.0f\n" 123.4567
> 
> error:
> 
> [ OK ] Stopped Serial Getty on ttyS0.
> [ OK ] Started Serial Getty on ttyS0.

Doing this on a x86-64 does not lead to this. Is this 32bit oder 64bit?

> the system loged out, and let login again.
> 
> I using bisect to find which commit break the it:
…
> 
> When I want to revert it, I found it's a serial patches, so if I revert it,
> I need to revert a serial patches.
> 
> So can anyone help me to trace where break the return from printf and break
> the parent process?

You could remove the FPU patches from the series file and check it still
happens.

Sebastian

  reply	other threads:[~2019-05-28 14:33 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-27  9:47 rt kernel break printf command's parent process ddu
2019-05-28 14:33 ` Sebastian Andrzej Siewior [this message]
2019-05-28 16:04   ` Sebastian Andrzej Siewior
2019-05-30  2:19     ` ddu

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