Date: Fri, 7 May 2021 09:48:07 -0700 From: Freddie Cash <fjwcash@gmail.com> To: Yasuhiro Kimura <yasu@utahime.org> Cc: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: Install of 13.0-RELEASE i386 with ZFS root hangs up Message-ID: <CAOjFWZ4m6ctgA%2BzOXXKk-cfEgypTcFKH58%2BVyJO%2BH4b=0nA=JQ@mail.gmail.com> In-Reply-To: <20210507.214759.1825935389016318351.yasu@utahime.org> References: <20210507.214759.1825935389016318351.yasu@utahime.org>
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On Fri, May 7, 2021 at 5:49 AM Yasuhiro Kimura <yasu@utahime.org> wrote: > 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. > Running ZFS on 32-bit OSes is doable (although not recommended) but requires a lot of manual configuration and tweaking, especially around kernel memory and ARC usage. You're limited to 4 GB of memory space, so you need to tune the ARC to use less than that. The auto-tuning has improved a lot over the years, but you still need to limit the ARC size to around 2 GB (or less) to keep the system stable. KVA memory space tuning shouldn't be needed anymore, but you can do research into that, just in case. You can compile a custom kernel to enable PAE support, that will sometimes help with memory issues on i386 (and will allow you to use more than 4 GB of system RAM, although individual processes are still limited to 4 GB). If you really need to, you can make ZFS work on i386. If at all possible, though, you really should run it on amd64 instead. -- Freddie Cash fjwcash@gmail.com
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