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CVS commit: [yamt-pagecache] src/sys/uvm

Module Name:    src
Committed By:   yamt
Date:           Wed Nov  2 21:55:39 UTC 2011

Added Files:
        src/sys/uvm [yamt-pagecache]: uvm_page_array.c uvm_page_array.h

Log Message:
page cache related changes

- maintain object pages in radix tree rather than rb tree.
- reduce unnecessary page scan in putpages.  esp. when an object has a ton of
  pages cached but only a few of them are dirty.
- reduce the number of pmap operations by tracking page dirtiness more
  precisely in uvm layer.
- fix nfs commit range tracking.
- fix nfs write clustering.  XXX hack

To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1.2.1 src/sys/uvm/uvm_page_array.c \
    src/sys/uvm/uvm_page_array.h src/sys/uvm/uvm_page_status.c

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

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