Messages in this thread |  | | From | Nick LeRoy <> | Subject | Re: Swap | Date | Tue, 20 Nov 2001 15:19:45 -0600 |
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On Tuesday 20 November 2001 15:05, Steffen Persvold wrote: > Christopher Friesen wrote: > > "Richard B. Johnson" wrote: > > > On Tue, 20 Nov 2001, Wolfgang Rohdewald wrote: > > > > On Tuesday 20 November 2001 15:51, J.A. Magallon wrote: > > > > > When a page is deleted for one executable (because we can re-read > > > > > it from on-disk binary), it is discarded, not paged out. > > > > > > > > What happens if the on-disk binary has changed since loading the > > > > program? - > > > > > > It can't. That's the reason for `install` and other methods of changing > > > execututable files (mv exe-file exe-file.old ; cp newfile exe-file). > > > The currently open, and possibly mapped file can be re-named, but it > > > can't be overwritten. > > > > Actually, with NFS (and probably others) it can. Suppose I change the > > file on the server, and it's swapped out on a client that has it mounted. > > When it swaps back in, it can get the new information. > > This sounds really dangerous... What about shared libraries ??
It is. Usually it ends with a loud 'boom' the process crashes & burns.
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