Messages in this thread |  | | Date | Tue, 20 Nov 2001 22:05:37 +0100 | From | Steffen Persvold <> | Subject | Re: Swap |
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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 ??
Regards, -- Steffen Persvold | Scalable Linux Systems | Try out the world's best mailto:sp@scali.no | http://www.scali.com | performing MPI implementation: Tel: (+47) 2262 8950 | Olaf Helsets vei 6 | - ScaMPI 1.12.2 - Fax: (+47) 2262 8951 | N0621 Oslo, NORWAY | >300MBytes/s and <4uS latency - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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