On Thursday 30 August 2007 23:34:52 you wrote: > On Thu, 30 Aug 2007, Clemens Kolbitsch wrote: > > is there no way to tell the kernel, that a certain mapping must not be > > removed, no matter what (except of course an explicit call to sys_unmap, > > of course)? > > I don't seem to get what is the issue here. Your mapping is not removed, > only the VMAs are merged together into one larger VMA if they have > neighbouring address ranges and compatible protection bits. See > vma_merge().
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. is there a way to tell it that the second mmap MUST fail? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
