Date: Mon, 25 Sep 2006 10:49:53 +0200 From: =?ISO-8859-1?Q?Johan_Str=F6m?= <johan@stromnet.org> To: freebsd-stable@freebsd.org Subject: Re: Total crash in gdb!.. something is broken!.. Was: Re: FreeBSD with a Gigabyte GA-K8NSC? Message-ID: <F9196F01-BC44-40C8-8606-F857D5A9ABE8@stromnet.org> In-Reply-To: <D4948640-AE7A-43B8-B997-EA7BECE5DAE4@solfertje.student.utwente.nl> References: <C8AEA7B4-3E12-43A7-A618-F35E74C1511C@stromnet.org> <118EDA90-D7D7-4A07-B7D2-3710384308D1@stromnet.org> <D5A683ED-67D0-4E2E-BE0C-E34812F9B52E@stromnet.org> <955CD271-C649-4423-848C-42912C5134A2@stromnet.org> <D4948640-AE7A-43B8-B997-EA7BECE5DAE4@solfertje.student.utwente.nl>
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fOn Sep 25, 2006, at 09:55 , Alban Hertroys wrote:
> On Sep 25, 2006, at 8:36, Johan Str=F6m wrote:
>
>
>> What exactly does
>>
>> kernel dumps on /dev/mirror/gm0s1b
>>
>> mean? Not that it saves any kernel dumps at least.. But otoh I =20
>> have no clue why it
>>
>
> It means exactly that. IIRC kernel dumps are created in swap space =20
> and on the next boot are moved to ${dumpdir}. I'm pretty certain =20
> this is explained nicely in the handbook[1].
>
Probably is, yes I know what it means, I was just pretty upset at the =20=
moment..;)
>
> AFAIK kernels can only be dumped on real devices, not on virtual =20
> devices like /dev/mirror/*. In that case your setup is not going to =20=
> get you any dumps.
>
In earlier FBSD (6.0 i think?) one got an ioctl error when trying to =20
dumpon to a gmirror device, but if I dont recall wrong this has been =20
changed since (I dont get an ioctl error anymore at least...)
>
> Besides that, it is probably not a very good idea to mirror your =20
> swap. I am certain it is bad for performance, if it'd gain you =20
> reliability is beyond my knowledge. This has been discussed before, =20=
> you probably want to check the archives.
>
Performance yes, but I think I've read that it is "best" anyway, if =20
one of your disks dies, youd dont want to loose half your swap since =20
that would not be very good if there is anything swapped out to that =20
disk..
>
> [1] Which I didn't check as I'm about to be in a hurry...
> --
> Alban Hertroys
>
> Priest to alien: "We want to know, is there a =
higher being?".
> Alien: "Well, actually that's why we're here,
> we're sheer out of virgins".
>
>
>
> !DSPAM:259,45178b407241208415560!
>
>
>
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