Messages in this thread | | | Date | Sun, 10 Jul 2005 08:54:38 -0400 | From | Wakko Warner <> | Subject | Re: Swap partition vs swap file |
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Bernd Eckenfels wrote: > In article <20050710014559.GA15844@animx.eu.org> you wrote: > > You misunderstood entirely what I said. > > There is no portable/documented way to grow a file without having the file > system null its content. However why is that a problem, you dont create > those files very often. Besides it is better for the OS to be able to asume > that a page with zeros in it is equal to the page on fresh swap.
So are you saying that if I create a swap partition it's best to use dd to zero it out before mkswap? If no, then why would a file be different? I know there's no documented way to create a file of given size without writing content. I saw windows grow a pagefile several meg in less than a second so I'm sure that it doesn't zero out the space first.
As far as portable, we're talking about linux, portability is not an issue in this case. I myself don't use swap files (or partitions), however, there was a project I recall that would dynamically add/remove swap as needed. Creating a file of 20-50mb quickly would have been beneficial.
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