| Date | Mon, 30 Apr 2001 01:53:01 +0200 | From | Andrea Arcangeli <> | Subject | Re: X15 alpha release: as fast as TUX but in user space (fwd) |
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On Sun, Apr 29, 2001 at 09:38:04PM +0200, Jamie Lokier wrote: > Fwiw, modern x86 has global TLB entries too.
my x86-64 implementation is marking the tlb entry global of course (so it's not flushed during context switch):
#define __PAGE_KERNEL_VSYSCALL \ (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) #define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) #define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
static void __init map_vsyscall(void) { extern char __vsyscall_0; unsigned long physaddr_page0 = (unsigned long) &__vsyscall_0 - __START_KERNEL_map;
__set_fixmap(VSYSCALL_FIRST_PAGE, physaddr_page0, PAGE_KERNEL_VSYSCALL); }
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