CVS commit: src/sys

[Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>]

Module Name:    src
Committed By:   rmind
Date:           Sun Jun 28 15:18:51 UTC 2009

Modified Files:
        src/sys/arch/amd64/amd64: vector.S
        src/sys/arch/i386/i386: vector.S
        src/sys/arch/x86/include: pmap.h
        src/sys/arch/x86/x86: pmap.c
        src/sys/kern: kern_synch.c sys_pipe.c
        src/sys/sys: lwp.h pipe.h
        src/sys/uvm: files.uvm uvm.h uvm_extern.h uvm_glue.c uvm_init.c
Added Files:
        src/sys/uvm: uvm_emap.c

Log Message:
Ephemeral mapping (emap) implementation.  Concept is based on the idea that
activity of other threads will perform the TLB flush for the processes using
emap as a side effect.  To track that, global and per-CPU generation numbers
are used.  This idea was suggested by Andrew Doran; various improvements to
it by me.  Notes:

- For now, zero-copy on pipe is not yet enabled.
- TCP socket code would likely need more work.
- Additional UVM loaning improvements are needed.

Proposed on <tech-kern>, silence there.
Quickly reviewed by <ad>.


To generate a diff of this commit:
cvs rdiff -u -r1.29 -r1.30 src/sys/arch/amd64/amd64/vector.S
cvs rdiff -u -r1.45 -r1.46 src/sys/arch/i386/i386/vector.S
cvs rdiff -u -r1.24 -r1.25 src/sys/arch/x86/include/pmap.h
cvs rdiff -u -r1.85 -r1.86 src/sys/arch/x86/x86/pmap.c
cvs rdiff -u -r1.264 -r1.265 src/sys/kern/kern_synch.c
cvs rdiff -u -r1.114 -r1.115 src/sys/kern/sys_pipe.c
cvs rdiff -u -r1.119 -r1.120 src/sys/sys/lwp.h
cvs rdiff -u -r1.27 -r1.28 src/sys/sys/pipe.h
cvs rdiff -u -r1.13 -r1.14 src/sys/uvm/files.uvm
cvs rdiff -u -r1.55 -r1.56 src/sys/uvm/uvm.h
cvs rdiff -u -r0 -r1.1 src/sys/uvm/uvm_emap.c
cvs rdiff -u -r1.154 -r1.155 src/sys/uvm/uvm_extern.h
cvs rdiff -u -r1.137 -r1.138 src/sys/uvm/uvm_glue.c
cvs rdiff -u -r1.34 -r1.35 src/sys/uvm/uvm_init.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.