Messages in this thread |  | | Date | Sun, 19 Jan 1997 11:40:39 +0100 | From | Gerd Knorr <> | Subject | Re: Swap Files |
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In linux.dev.kernel you write:
>On Sat, 18 Jan 1997, Ion Badulescu wrote:
>Perhaps rather than modifying the kernel proper it would be easier to >mount swapfiles using the loop device, then a swapoff -a would (if, of >course, it were configured as such in fstab) indeed permit the fs to be >umounted at shutdown. If this were to become standard, then the swap >utils could be reduced to handling nothing but swap partitions, making >them all the more simple. It would, however, introduce some >incompatabilities between the versions of the swap utils and >configurations. Sorry, but I haven't tried this, as I don't use >swapfiles.
It is'nt that simple. Turn on swap *partitions* is one of the first things you do at boot time. Usally before checking and mounting filesystems. For swap *files* you have to wait until your filesystems are mounted.
Same for shutdown: Turn off swap files has to be done before umounting filesystems, swap partitions can later.
I use this "two-step" swapon: Have a 40 MB swap partition, and after mounting all the filesystems I run a script which searches the DOS-Partitions for 386spart.par files :-) BTW: swap priorities are handy for this: Of cource it is a good idea to run the swap file at lower priority...
For the new swapon/off: Would be handy to have a "-t [ file | part ]" switch.
Gerd
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