Re: Swap

[Trond Myklebust]

>>>>> " " == Dan Maas <[e-mail]> writes:

     > But NFS still allows atomic rename() right? Isn't it considered
     > essential to write the new executable or library under a
     > different name, and then atomically rename() over the old one? 
     > If you write() directly into the executable, you will get what
     > you deserve...

Atomic rename works fine, on NFS, so if you just rename the old
library, you're quite safe. The bugs start to surface if you:

   a) Reuse the the old library's inode by doing something along the
      lines of open("lib.so",O_TRUNC|O_WRONLY).
or
   b) erase the old library.

Cheers,
   Trond