git: kernel - SWAP CACHE part 6/many - Refactor swap_pager_frees
commit 8d292090b933bb902477afb2312e290b83bb7d16
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Wed Feb 3 19:02:45 2010 -0800
kernel - SWAP CACHE part 6/many - Refactor swap_pager_freespace()
* Refactor swap_pager_freespace() to use a RB_SCAN() instead of a
vm_pindex_t iteration. This is necessary if we intend to allow
swap backing store for vnodes because the related files & VM objects
can be huge. This is also generally a good idea in 64-bit mode
to help deal with x86_64's massive address space.
* Start adding swap space freeing calls in the OBJT_VNODE handling code
and generic VM object handling code.
* Remove various checks for OBJT_SWAP from swap*() and swp*() functions
to allow them to be used with OBJT_VNODE objects.
* Add checks for degenerate cases to reduce call overheads as the swap
handling functions are now called for vnode objects too.
* Add assertions for pagers which do not need swap support.
Summary of changes:
sys/vm/default_pager.c | 1 +
sys/vm/device_pager.c | 1 +
sys/vm/phys_pager.c | 1 +
sys/vm/swap_pager.c | 150 +++++++++++++++++++++++++++++++++---------------
sys/vm/swap_pager.h | 4 +-
sys/vm/vm_object.c | 23 +++++---
sys/vm/vm_pager.c | 1 +
sys/vm/vnode_pager.c | 2 +
8 files changed, 127 insertions(+), 56 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/8d292090b933bb902477afb2312e290b83bb7d16
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