git: kernel - SWAP CACHE part 19/many - distinguish bulk data in
commit b8a41159211b865cc8ea882ac52601f4230dc766
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Thu Feb 11 20:54:05 2010 -0800
kernel - SWAP CACHE part 19/many - distinguish bulk data in HAMMER block dev
* Add buf->flags/B_NOTMETA, vm_page->flags/PG_NOTMETA. If set the pages
underlying the buffer will not be considered meta-data from the
point of view of the swapcache.
* HAMMER must sometimes access bulk data via the block device instead of
via a file vnode. For example, the reblocking and mirroring code.
We do not want this data to be misinterpreted as meta-data when
the meta-data-only swapcache is turned on, otherwise it will blow
out the actual meta-data in the swapcache.
HAMMER_RECTYPE_DATA and HAMMER_RECTYPE_DB are considered normal data.
All other record types (e.g. direntry, inode, etc) are meta-data.
Summary of changes:
sys/kern/vfs_bio.c | 7 +++++++
sys/sys/buf.h | 8 +++++++-
sys/vfs/hammer/hammer.h | 1 +
sys/vfs/hammer/hammer_btree.c | 20 ++++++++++++++++++++
sys/vfs/hammer/hammer_io.c | 15 +++++++++++++++
sys/vfs/hammer/hammer_reblock.c | 1 +
sys/vm/vm_page.h | 2 ++
sys/vm/vm_swapcache.c | 2 +-
8 files changed, 54 insertions(+), 2 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/b8a41159211b865cc8ea882ac52601f4230dc766
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