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Date:      Mon, 16 Jul 2012 14:57:33 +0400
From:      "Andrey V. Elsukov" <ae@FreeBSD.org>
To:        Andriy Gapon <avg@FreeBSD.org>
Cc:        freebsd-hackers <freebsd-hackers@FreeBSD.org>, Marius Strobl <marius@FreeBSD.org>, freebsd-current <freebsd-current@FreeBSD.org>, Pawel Jakub Dawidek <pjd@FreeBSD.org>
Subject:   Re: [CFC/CFT] large changes in the loader(8) code
Message-ID:  <5003F39D.6030808@FreeBSD.org>
In-Reply-To: <5003EBAB.6030507@FreeBSD.org>
References:  <4FE9B01C.30306@yandex.ru> <5003EBAB.6030507@FreeBSD.org>

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On 16.07.2012 14:23, Andriy Gapon wrote:
> on 26/06/2012 15:50 Andrey V. Elsukov said the following:
>> 3. ZFS code now uses new API and probing on the systems with many disk=
s
>> should be greatly increased:
>>         zfs/zfs.c
>>         i386/loader/main.c
>=20
> First of all, it's hard to parse the above sentence. "probing ... shoul=
d be
> greatly increased".  Probing what? :-)  If probing time, then we don't =
want that ;-)
>=20
> I looked through the ZFS-related part and here are a few comments:

Thanks for that.

> 1. I think that the predominant indentation style of i386/loader/main.c=
 should be
> preserved for consistency.
>=20
> 2. I am not sure if I like the approach of moving partition tasting cod=
e into
> common ZFS code (zfs.c).  On one hand, it now makes sense because the n=
ew
> partition iteration code is machine-independent.  On the other hand, th=
e reason
> that I added arch_zfs_probe method was to give platforms full control o=
ver which
> partitions and in what order are probed.  It seems to be important for =
some of them.
> So, I like how your new partition interface makes it much easier to ZFS=
-probe
> partitions, but I would prefer to have that code in arch_zfs_probe impl=
ementations
> rather than in zfs_probe_dev.

=46rom the other point of view, ZFS is not a just file system and it work=
s
directly with disks and partitions. And it seems to me this code will be =
common
for other architectures.

> 3.  Related to the above.  In what shape is sparc64 ZFS support in your=
 branch?
> Have you tried to adapt it to the new model too?
> It's the platform that has special requirements for disk/partition prob=
ing order.
> Marius can help with additional information and testing here.

Currently i have not received any feedback reports from the users who can=
 test
patches on the other architectures. I added VTOC8 support to the part.c, =
but it
seems it is not needed and ofw can work without this.


--=20
WBR, Andrey V. Elsukov



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