Swap files and panics

[Derek Ragona]

At 10:54 AM 5/29/2012, Warren Block wrote:
>Recently I rearranged partitions on an SSD.  The swap partition was 
>eliminated in favor of a swap file on /usr.  This works, allows TRIM 
>support on the swap space, and is easier to resize than a partition.
>
>However, sometimes the system panics on shutdown.  It happens after 
>"syncing disks", so the filesystems are fine, but it's disconcerting.
>
>I suspect but haven't yet managed to prove that it's only when swap is not 
>empty.  A race condition involving when the filesystems are unmounted?  Or 
>should there be some code in /etc/rc.d/addswap to run swapoff before shutdown?
>
>This is on a very recent 9-STABLE amd64, i5 2500K.
>
>rc.conf:
>swapfile="/usr/swap/swap"


Did you remove the old swap file entry from /etc/fstab?

-Derek

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