git: kernel - Introduce lightweight buffers
commit 5c5185ae1c44d1e9a2eb9d6d55dd551a57aa9ef1
Author: Samuel J. Greear <sjg@thesjg.com>
Date: Tue Mar 9 02:24:55 2010 -0700
kernel - Introduce lightweight buffers
* Summary:
The lightweight buffer (lwbuf) subsystem is effectively a reimplementation
of the sfbuf (sendfile buffers) implementation. It was designed to be
lighter weight than the sfbuf implementation when possible, on x86_64
we use the DMAP and the implementation is -very- simple. It was also
designed to be more SMP friendly.
* Replace all consumption of sfbuf with lwbuf
* Refactor sfbuf to act as an external refcount mechanism for sendfile(2),
this will probably go away eventually as well.
Summary of changes:
share/man/man9/Makefile | 1 +
share/man/man9/lwbuf.9 | 112 +++++++++++++++
sys/boot/common/help.common | 5 -
sys/boot/common/loader.8 | 6 -
sys/boot/forth/loader-bootp.conf | 1 -
sys/boot/forth/loader.conf | 1 -
sys/cpu/i386/include/lwbuf.h | 85 ++++++++++++
sys/cpu/i386/misc/lwbuf.c | 203 ++++++++++++++++++++++++++++
sys/cpu/x86_64/include/lwbuf.h | 80 +++++++++++
sys/cpu/x86_64/misc/lwbuf.c | 97 +++++++++++++
sys/kern/imgact_elf.c | 21 ++--
sys/kern/kern_exec.c | 17 ++-
sys/kern/kern_sfbuf.c | 209 +++++++----------------------
sys/kern/kern_subr.c | 15 +-
sys/kern/kern_umtx.c | 13 +-
sys/kern/kern_xio.c | 35 +++---
sys/kern/subr_param.c | 11 +--
sys/kern/uipc_syscalls.c | 60 ++------
sys/platform/pc32/conf/files | 1 +
sys/platform/pc32/i386/genassym.c | 1 +
sys/platform/pc32/i386/globals.s | 3 +
sys/platform/pc32/include/globaldata.h | 4 +
sys/platform/pc64/conf/files | 1 +
sys/platform/vkernel/conf/files | 1 +
sys/platform/vkernel/i386/genassym.c | 1 +
sys/platform/vkernel/i386/global.s | 3 +
sys/platform/vkernel/include/globaldata.h | 4 +
sys/platform/vkernel/platform/copyio.c | 18 ++--
sys/sys/exec.h | 6 +-
sys/sys/imgact.h | 2 +-
sys/sys/sfbuf.h | 40 ++----
sys/vfs/tmpfs/tmpfs_vnops.c | 1 -
sys/vm/vm_fault.c | 11 +-
sys/vm/vnode_pager.c | 11 +-
34 files changed, 751 insertions(+), 329 deletions(-)
create mode 100644 share/man/man9/lwbuf.9
create mode 100644 sys/cpu/i386/include/lwbuf.h
create mode 100644 sys/cpu/i386/misc/lwbuf.c
create mode 100644 sys/cpu/x86_64/include/lwbuf.h
create mode 100644 sys/cpu/x86_64/misc/lwbuf.c
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/5c5185ae1c44d1e9a2eb9d6d55dd551a57aa9ef1
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