-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Eugene Surovegin wrote: | On Thu, Feb 17, 2005 at 04:43:27PM -0800, Eugene Surovegin wrote: | |>On Thu, Feb 17, 2005 at 03:38:05PM -0800, Stephen Williams wrote:
|>>But if I do that, I want to remove the program from the directory |>>after I start it, so that the file does not take up ram space. Will |>>that actually work? I'm using exec(2) to execute the program file |>>wherever it is downloaded. Will a subsequent unlink of the file |>>have a result, or will the file continue to take up space as |>>backing store for the executable? |>I think unlink will remove the file from directory (so you won't be |>able to see it with ls), but it will still continue to to take space - |>you're right it will be used as backing store, at least for read-only |>segments, which can be discarded if memory is tight. Even if you mlock |>all executable in memory, I think there will be still at least one |>reference to this file, which will prevent freeing tmpfs memory. | | | A little correction, according to tmpfs doc, it lives completely in | page cache, so I think memory is not wasted for unmodified sections of | the loaded file (e.g. a second copy, when file is executed and loaded | into user-space, isn't being made). | | But as usual, make some measurements first :) So far as I can see in my simplistic tests, this still takes twice as much memory as leaving the executable on a disk somewhere. This seems to be an inevitable consequence of execve on Linux 2.4.x. That's a bummer. Any other suggestions? - -- Steve Williams "The woods are lovely, dark and deep. steve at icarus.com But I have promises to keep, http://www.icarus.com and lines to code before I sleep, http://www.picturel.com And lines to code before I sleep." -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFCFjrjrPt1Sc2b3ikRAjwvAKCogiZ5i+OHdsGskhsfC97+jxl/ygCgqAql P77LUWxMW87T7ReXVg27fj8= =j9KI -----END PGP SIGNATURE-----
