Search results
Results from the WOW.Com Content Network
Second Level Address Translation (SLAT), also known as nested paging, is a hardware-assisted virtualization technology which makes it possible to avoid the overhead associated with software-managed shadow page tables.
In protected mode with paging enabled (bit 31, PG, of control register CR0 is set), but without PAE, x86 processors use a two-level page translation scheme. Control register CR3 holds the page-aligned physical address of a single 4 KB long page directory .
Nested page tables can be implemented to increase the performance of hardware virtualization. By providing hardware support for page-table virtualization , the need to emulate is greatly reduced. For x86 virtualization the current choices are Intel 's Extended Page Table feature and AMD 's Rapid Virtualization Indexing feature.
When pure demand paging is used, pages are loaded only when they are referenced. A program from a memory mapped file begins execution with none of its pages in RAM. As the program commits page faults, the operating system copies the needed pages from a file, e.g., memory-mapped file, paging file, or a swap partition containing the page data ...
The 80386, which introduced the 32-bit IA-32 version of x86, and subsequent x86 CPUs, support segmentation and paging. If paging is enabled, the base address in a segment descriptor is an address in a linear paged address space divided into 4 KB pages, so when that is added to the offset in the segment, the resulting address is a linear address ...
Protected mode is enable by default and may interfere with AOL Mail. If you're continuing to have trouble accessing mail, turn Protected Mode off: 1. Click Tools. 2. Click Internet Options. 3. Click the Security tab. 4. Deselect "Enable Protected Mode." 5. Restart Internet Explorer and sign in to AOL Mail again.
If the paging unit is enabled, addresses in a segment are now virtual addresses, rather than physical addresses as they were on the 80286. That is, the segment starting address, the offset, and the final 32-bit address the segmentation unit derived by adding the two are all virtual (or logical) addresses when the paging unit is enabled.
Sometimes the old "turn it off and on again" actually works. In this case, try completely signing out of your account then sign back in. Many times, this will help, especially in cases of bad passwords or some simple browser issues.