diff options
| author | Martin Pieuchot <mpi@cvs.openbsd.org> | 2019-12-16 10:34:05 +0000 |
|---|---|---|
| committer | Martin Pieuchot <mpi@cvs.openbsd.org> | 2019-12-16 10:34:05 +0000 |
| commit | d66bc066a1c331924289f45c29d1f6a4042862f8 (patch) | |
| tree | b4012ff941297e99f46ccb86438eddaaa099da62 /share/man/man9 | |
| parent | a522193fa90bfc8c67551f15608a340fd5657055 (diff) | |
Use 'UVM' when the page talks about the memory subsystem instead of functions.
This leaves a single uvm_init(9) occurence.
Diffstat (limited to 'share/man/man9')
| -rw-r--r-- | share/man/man9/pmap.9 | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/share/man/man9/pmap.9 b/share/man/man9/pmap.9 index 58c8b222ae4..e63db86c971 100644 --- a/share/man/man9/pmap.9 +++ b/share/man/man9/pmap.9 @@ -1,4 +1,4 @@ -.\" $OpenBSD: pmap.9,v 1.18 2019/12/06 19:15:16 jmc Exp $ +.\" $OpenBSD: pmap.9,v 1.19 2019/12/16 10:34:04 mpi Exp $ .\" .\" Copyright (c) 2001, 2002, 2003 CubeSoft Communications, Inc. .\" <http://www.csoft.org> @@ -24,7 +24,7 @@ .\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE .\" POSSIBILITY OF SUCH DAMAGE. .\" -.Dd $Mdocdate: December 6 2019 $ +.Dd $Mdocdate: December 16 2019 $ .Dt PMAP_INIT 9 .Os .Sh NAME @@ -85,15 +85,13 @@ function is called from the machine-independent .Xr uvm_init 9 initialization code, when the MMU is enabled. .Sh PAGE MANAGEMENT -Modified/referenced information is only tracked for pages managed by -.Xr uvm_init 9 +Modified/referenced information is only tracked for pages managed by UVM (pages for which a vm_page structure exists). Only managed mappings of those pages have modified/referenced tracking. The use of unmanaged mappings should be limited to code which may execute in interrupt context (such as .Xr malloc 9 ) -or to enter mappings for physical addresses which are not managed by -.Xr uvm_init 9 . +or to enter mappings for physical addresses which are not managed by UVM. This allows .Nm pmap modules to avoid blocking interrupts when manipulating data structures or @@ -103,8 +101,7 @@ The modified/referenced bits must be tracked on a per-page basis, as they are not attributes of a mapping, but attributes of a page. Therefore, even after all mappings for a given page have been removed, the modified/referenced bits for that page must be preserved. -The only time the modified/referenced bits may be cleared is when -.Xr uvm_init 9 +The only time the modified/referenced bits may be cleared is when UVM explicitly calls the .Fn pmap_clear_modify and @@ -429,8 +426,7 @@ The .Bx 4.4 .Nm pmap module is based on Mach 3.0. -The introduction of -.Xr uvm_init 9 +The introduction of UVM left the .Nm pmap interface unchanged for the most part. |