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Date:      Sat, 08 May 2021 07:31:47 +0900 (JST)
From:      Yasuhiro Kimura <yasu@utahime.org>
To:        freebsd-current@freebsd.org, freebsd-stable@freebsd.org
Subject:   Loading zfs module results in hangup on i386 (Re: Install of 13.0-RELEASE i386 with ZFS root hangs up)
Message-ID:  <20210508.073147.1934590966598603586.yasu@utahime.org>
In-Reply-To: <20210507.214759.1825935389016318351.yasu@utahime.org>
References:  <20210507.214759.1825935389016318351.yasu@utahime.org>

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From: Yasuhiro Kimura <yasu@utahime.org>
Subject: Install of 13.0-RELEASE i386 with ZFS root hangs up
Date: Fri, 07 May 2021 21:47:59 +0900 (JST)

> Hello,
> 
> Does anyone succeed to install 13.0-RELEASE i386 with ZFS root?
> 
> I tried this with VirtualBox and VMware Player on Windows with
> following VM condition.
> 
> * 4 CPUs
> * 8GB memory
> * 100GB disk
> * Bridge mode NIC
> 
> But in both cases, VM gets high CPU load and hangs up after I moved
> to 'YES' at 'ZFS Configuration' menu and type return key.
> 
> If I select UFS root installation completes successfully. So the
> problem is specific to ZFS root.

Now I think I know what is the source of problem. After all, on
13.0-RELEASE i386 system simply loading zfs module results in system
hang up.

The steps to reproduce it are,

1. Boot with install media of 13.0-RELEASE i386
2. At the first menu of FreeBSD installer, select 'Shell'.
3. At the shell prompt, type `kldload zfs` and return key.

I confirmed hangup happens with VirtualBox, VMware Player and my bare
metal PC environement. So the problem doesn't depend on hardware.

And hangup also happens with 13-STABLE and 14-CURRENT.

---
Yasuhiro Kimura



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