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Date:      Mon, 3 Aug 2015 14:48:21 -0600
From:      Warner Losh <imp@bsdimp.com>
To:        Slawa Olhovchenkov <slw@zxy.spb.ru>
Cc:        Julian Elischer <julian@freebsd.org>, Konstantin Belousov <kostikbel@gmail.com>, Steven Hartland <steven@multiplay.co.uk>, Peter Wemm <peter@wemm.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org, src-committers@freebsd.org
Subject:   Re: svn commit: r286223 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
Message-ID:  <CFB4CACC-E730-47BD-905D-03F8DCF863F9@bsdimp.com>
In-Reply-To: <20150803194412.GC8792@zxy.spb.ru>
References:  <201508030934.t739YAkT026668@repo.freebsd.org> <20150803094730.GA24698@zxy.spb.ru> <55BF431E.3020601@freebsd.org> <2757800.HIDNx1G49O@overcee.wemm.org> <20150803111942.GB2072@kib.kiev.ua> <55BF557B.60009@multiplay.co.uk> <20150803120359.GC2072@kib.kiev.ua> <55BFC296.5050402@freebsd.org> <20150803194412.GC8792@zxy.spb.ru>

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> On Aug 3, 2015, at 1:44 PM, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote:
>=20
> On Tue, Aug 04, 2015 at 03:35:50AM +0800, Julian Elischer wrote:
>=20
>> On 8/3/15 8:03 PM, Konstantin Belousov wrote:
>>> On Mon, Aug 03, 2015 at 12:50:19PM +0100, Steven Hartland wrote:
>>>> For this change I don't want to get into fixing the thread0 stack =
size,
>>>> which can be done later, just
>>>> to provide a reasonable warning to the user that smaller values =
could
>>>> cause a panic.
>>> Hmm, is it limited to the thread0 only ?  I.e., would only =
increasing
>>> the initial thread stack size be enough to boot the kernel ?  The =
zfs
>>> threads do request larger stack size, I know this.
>>>=20
>>> Can somebody test the following patch in the i386 configuration =
which
>>> does not boot ?
>>=20
>> I think this is a reasonable thing to do. Thread0 (and proc0) are =
special.
>> I don't see why giving it a specially sized stack would be a problem.
>=20
> This is always do for ARM.
> May be need increase stack size for Thread0 on ARM too?

Seems reasonable. There should be a MI way of doing this, but all the =
code and defines are buried in MD files, so each architecture needs some =
love to make this a reality.

Warner


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