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Date: Mon, 17 Oct 2005 15:20:50 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: Toomas Aas <toomas.aas@raad.tartu.ee>
Message-ID: <20051017192050.GA10875@xor.obsecurity.org>
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Cc: questions@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject: Re: GIANT lock in 5.4
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On Mon, Oct 17, 2005 at 10:11:07PM +0300, Toomas Aas wrote:
> Kris Kennaway wrote:
>=20
> >On Mon, Oct 17, 2005 at 09:28:56PM +0300, Toomas Aas wrote:
> >
> >>Hello!
>=20
> ...
>=20
> >>With FreeBSD 5.3, several devices (for example: ips, ahc,=20
> >>atkbd) had a note similar to this in dmesg:
> >>
> >>ips0: <IBM ServeRAID Adapter> port 0x2000-0x20ff mem 	=09
> >>	0xfeb00000-0xfebfffff irq 9 at device 1.0 on pci0
> >>ips0: [GIANT-LOCKED]
> >>
> >>With FreeBSD 5.4, the [GIANT-LOCKED] message no longer appears.
> >>
> >>Does that mean that Giant lock has been removed from all those drivers,=
=20
> >>or is the message simply not printed?
> >
> >Do you still see it on some other drivers?  If so, the former.
>=20
> grep -i giant /var/run/dmesg.boot comes up blank on all my FreeBSD 5.4=20
> machines: the two RELENG_5_4 servers I've just upgraded and my home=20
> RELENG_5 box.

The message was surpressed, then.  It did generate a lot of confusion
from users who didn't realise that "Giant locked" was the state of the
*entire kernel* in 4.x and thought that this was a regression in 5.x.

Kris

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