Messages in this thread | | | Date | Wed, 1 Dec 1999 21:50:53 -0500 (EST) | From | Alexander Viro <> | Subject | Re: (XFree86) mmap of /proc/XXX/mem |
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On Thu, 2 Dec 1999, Egbert Eich wrote:
> Yes, but how? We need a solution otherwise we won't be able to > use the vm86 mode even on Intel. The emulator makes everything > even slower.
Check dosemu. The _real_ problem with /proc/<pid>/mem is that it needs very different behaviour in different parts of process address space. Just aliasing every page and hoping that extra reference will save your day is _very_ bad idea - behaviour of pages on swapout, etc. is determined by vma, not by reference in page table. We _might_ go for /proc/<pid>/object/ a-la Slowlaris, and that might be made mmap'able, but that's a separate story. And IMO an overkill.
Dosemu does aliasing in very similar situation. Check how it's done.
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