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On Sun, Sep 01, 2013 at 01:41:30PM +0800, Mark David Dumlao wrote |
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> Case in point - do you enable all the ext4 options, like acls and |
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> whatnot? Let's say no. |
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> |
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> What if you suddenly have to mount an external hard disk to |
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> recover some system on your server and the hard disk uses those ext4 |
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> options? If ext4 is hard built into your kernel, your recompile will |
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> have to basically redo the whole thing, whereas if ext4 was a module |
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> you would only recompile ext4 itself. |
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Have you ever actually done this? I'd be very leery of pulling such a |
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stunt. The clean way of switching module versions is to... |
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* unload the old module, and |
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* load the new module |
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You obviously can't do this in your setup, because unloading the old |
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module would mean you could no longer access the file system to read in |
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the new module... OOPS. |
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You could run a script that creates /dev/shm/lib/3.1.4.1.5.9-gentoo/ |
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(easy as pie<G>) and copies the new module to that dir. Then unload the |
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old module and load the new one, using modprobe with "-d /dev/shm/". |
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That still looks impossible. The problem is that you generally have a |
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whole bunch of files open at any time. E.g. try... |
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lsof -d txt | grep -v "/proc/" | less |
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...and look at the output. Shutting down all those open files would |
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be disastrous. But that's not what you're saying. You seem to imply |
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that file system code can be overwritten *IN PLACE, WHILE IN USE*, |
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without any problems. Colour me skeptical about that one. |
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-- |
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Walter Dnes <waltdnes@××××××××.org> |
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I don't run "desktop environments"; I run useful applications |
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