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Date:      Fri, 4 Oct 2019 21:53:07 +0200
From:      Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>
To:        freebsd-current@freebsd.org
Subject:   Re: ZFS with 32-bit, non-x86 kernel
Message-ID:  <095a72fe-c3d8-5c10-447a-659ed6b9f5ff@plan-b.pwste.edu.pl>
In-Reply-To: <b7c2b26488c0238f4e77657b5fce0d798ba13ebd.camel@freebsd.org>
References:  <bdfecbf4-00c6-e104-4090-c1013bac5a7f@FreeBSD.org> <2264fde0-d386-518f-2bdb-2b86afe1faf3@blastwave.org> <CANCZdfqyof2_DmbW3G3S2q2ZsFo8_zr2YUzO0SrFo1eg-HhiJw@mail.gmail.com> <b7c2b26488c0238f4e77657b5fce0d798ba13ebd.camel@freebsd.org>

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From: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>
To: freebsd-current@freebsd.org
Message-ID: <095a72fe-c3d8-5c10-447a-659ed6b9f5ff@plan-b.pwste.edu.pl>
Subject: Re: ZFS with 32-bit, non-x86 kernel
References: <bdfecbf4-00c6-e104-4090-c1013bac5a7f@FreeBSD.org>
 <2264fde0-d386-518f-2bdb-2b86afe1faf3@blastwave.org>
 <CANCZdfqyof2_DmbW3G3S2q2ZsFo8_zr2YUzO0SrFo1eg-HhiJw@mail.gmail.com>
 <b7c2b26488c0238f4e77657b5fce0d798ba13ebd.camel@freebsd.org>
In-Reply-To: <b7c2b26488c0238f4e77657b5fce0d798ba13ebd.camel@freebsd.org>

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On 04.10.2019 21:37, Ian Lepore wrote:
> On Fri, 2019-10-04 at 13:27 -0600, Warner Losh wrote:
>> On Fri, Oct 4, 2019, 1:07 PM Dennis Clarke <dclarke@blastwave.org> wro=
te:
>>
>>> On 10/4/19 10:05 AM, Andriy Gapon wrote:
>>>>
>>>> Does anyone use ZFS with a 32-bit kernel, that is also not i386 ?
>>>> If you do, could you please let me know?  Along with uname -rmp outp=
ut.
>>>> Thank you!
>>>>
>>>
>>> I don't know if that has even been attempted by anyone. The ZIL and Z=
FS
>>> log comonents require substantial amounts of memory and I am not awar=
e
>>> of anyone with arm devices that have 8GB+ of memory. I have had FreeB=
SD
>>> current on RISC-V running fairly well with ZFS however that was a pur=
ely
>>> rv64imafdc architecture.
>>>
>>
>> In the FreeBSD 10 time frame I know people were running ZFS on arm7 bo=
ards.
>> Iirc, there was a long list of tweaks needed to size of the ZIL. A qui=
ck
>> google didn't find it.
>>
>> Otoh, I looked at ZFS for NanoBSD when it first came out. I gave up be=
cause
>> the 256MB boards at the time made any kind of storage traffic ran thin=
gs
>> out of memory.
>>
>> Warner
>>
>>
>> I will watch this thread with curiosity.
>=20
> There have been several threads about using zfs on armv7 over the
> years.  Some of them are from 2013 and indicate little sucess.  Others,=

> from 2015, indicate it works...
>=20
> https://lists.freebsd.org/pipermail/freebsd-arm/2015-March/010607.html
> https://lists.freebsd.org/pipermail/freebsd-arm/2015-March/010649.html
>=20
> There have also been some bug reports as recently as 2017 indicating
> that people are still doing this on small armv7 systems.
>=20
> -- Ian

Following this thread, where Bernd Walter wrote small howto:

https://lists.freebsd.org/pipermail/freebsd-arm/2019-February/019455.html=


I had converted root filesystem to ZFS on SD card used with
RaspberryPi2, then used it with no issues running 13-CURRENT for 6
months until that old SD card got worn.

--=20
Marek Zarychta


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