Messages in this thread | | | Date | Thu, 30 Aug 2007 23:55:37 +0200 (CEST) | From | Jiri Kosina <> | Subject | Re: Forbid deletion of memory mappings |
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On Thu, 30 Aug 2007, Clemens Kolbitsch wrote:
> the thing is that they are not. the kernel chooses to REPLACE my > mapping. > consider the user-space code: > mmap(0xaaaa0000, 0x3000, MAP_FIXED, ...); > mmap(0xaaaa1000, 0x4000, MAP_FIXED, ...); > here, the second call to mmap will shorten the first mapping to 0x1000 bytes > and create one big vma with size 0x5000 bytes.
Which is exactly in compliance with what POSIX says about MAP_FIXED mmaps - see http://opengroup.org/onlinepubs/007908799/xsh/mmap.html
-- Jiri Kosina - 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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