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Diffstat (limited to 'share/doc/papers/newvm/1.t')
| -rw-r--r-- | share/doc/papers/newvm/1.t | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/share/doc/papers/newvm/1.t b/share/doc/papers/newvm/1.t index 036adee..7b66674 100644 --- a/share/doc/papers/newvm/1.t +++ b/share/doc/papers/newvm/1.t @@ -43,7 +43,7 @@ This section of the paper describes the current design, points out the current technological trends, and attempts to define the new design considerations that should be taken into account in a new virtual memory design. -.SH +.NH 2 Implementation of 4.3BSD virtual memory .PP All Berkeley Software Distributions through 4.3BSD @@ -71,7 +71,7 @@ to contain newly faulted pages. If a previously accessed page that has been pushed to swap is once again used, a free page is reallocated and filled from the swap area [Babaoglu79], [Someren84]. -.SH +.NH 2 Design assumptions for 4.3BSD virtual memory .PP The design criteria for the current virtual memory implementation @@ -110,7 +110,7 @@ Given the high cost of memory there was little incentive to have the kernel keep track of the contents of the swap area once a process exited since it could almost as easily and quickly be reread from the file system. -.SH +.NH 2 New influences .PP In the ten years since the current virtual memory system was designed, @@ -190,7 +190,7 @@ User Interface This section outlines our new virtual memory interface as it is currently envisioned. The details of the system call interface are contained in Appendix A. -.SH +.NH 2 Regions .PP The virtual memory interface is designed to support both large, @@ -259,7 +259,7 @@ processes that wish to attach to the region. Such a descriptor may be bound into the UNIX file system name space so that other processes can find it just as they would with a mapped file. -.SH +.NH 2 Shared memory as high speed interprocess communication .PP The primary use envisioned for shared memory is to |
