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Date:      Wed, 04 Apr 2012 15:23:18 +0200
From:      =?ISO-8859-1?Q?Peter_Ankerst=E5l?= <peter@pean.org>
To:        freebsd-fs@freebsd.org
Subject:   Re: Swap on ZFS / swap_pager: indefinite wait buffer
Message-ID:  <4F7C4B46.7030305@pean.org>
In-Reply-To: <CAB3Sx6f66QoT1jWY2eSxrB43X%2BSigTxEahTXL6ZGK8fFgSGHEQ@mail.gmail.com>
References:  <CAB3Sx6f66QoT1jWY2eSxrB43X%2BSigTxEahTXL6ZGK8fFgSGHEQ@mail.gmail.com>

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On 04/02/2012 08:13 PM, bsalinux@gmail.com wrote:
> Hi,
>
> I have been running FreeBSD 9.0-RELEASE from a USB stick running ZFS.
> I have created swap file on zfs volume using the md driver.
>
> Swapinfo shows
>
> Device          1K-blocks     Used    Avail Capacity
> /dev/md0          4194304        0  4194304     0%
>
>
> The system has hung twice and all I can find in the log is
>
> Mar 22 03:17:30 server kernel: swap_pager: indefinite wait buffer:
> bufobj: 0, blkno: 927, size: 4096
> Mar 23 09:00:26 server kernel: swap_pager: indefinite wait buffer:
> bufobj: 0, blkno: 55, size: 4096
> Mar 23 22:01:26 server kernel: swap_pager: indefinite wait buffer:
> bufobj: 0, blkno: 49, size: 4096
> Mar 24 04:00:38 server kernel: swap_pager: indefinite wait buffer:
> bufobj: 0, blkno: 60, size: 4096
>
> As the swap is on zfs, I assume it is not failing.
>
> Do I need to move swap off of ZFS?
>
> Thanks
> _______________________________________________
> freebsd-fs@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-fs
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>
I had alot of this when I had swap on zfs. Everything went away when I 
moved the swap off
zfs.



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