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From: Ryusuke Konishi on 6 Aug 2010 06:40
Hi Linus,

please pull from

git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2.git for-linus

to receive nilfs2 updates for 2.6.36. Mostly improved btree
implementation, reformed super block writeback, and refactoring of
recovery routines. There are also minor fixes and cleanups.

No major function is added, but several minor changes and improvements
are included:

* Read-ahead applied to btree lookup to mitigate read performance
penalty that nilfs incurs on some devices; sibling nodes at the
lowest level of btrees are read ahead to boost sequential read.

* Alternately updated super blocks. This allows fallback of log scan
with the older super block, and resolves mount failure reported
under certain environment.

* A few complementary mount options added to allow re-enabling or
disabling features by remount. (e.g. "nodiscard" against "discard")

* Three feature flag sets added to super block: compatible feature
set, read-only compatible feature set, and incompatible feature
set. These serve as a safety for future disk format change.

* Fix an overflow issue in directory with 64KB block size.

* Early check on btree nodes which makes handling of filesystem
corruption more secure.

Thanks!

Ryusuke Konishi

--
The following changes since commit b37fa16e78d6f9790462b3181602a26b5af36260:
Linus Torvalds (1):
Linux 2.6.35-rc6

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2.git for-linus

Jiro SEKIBA (2):
nilfs2: introduce nilfs_prepare_super
nilfs2: sync super blocks in turns

Ryusuke Konishi (43):
nilfs2: add blocksize member to nilfs object
nilfs2: refactor recovery logic routines
nilfs2: rename nilfs_recover_logical_segments function
nilfs2: divide load_segment_summary function
nilfs2: do not use nilfs_segsum_info structure in recovery code
nilfs2: get rid of macros for segment summary information
nilfs2: get rid of ns_free_segments_count
nilfs2: do not update mount time on rw->ro remount
nilfs2: add nilfs_cleanup_super
nilfs2: add nilfs_set_error
nilfs2: separate function that updates log position
nilfs2: separate setup of log cursor from init_nilfs
nilfs2: add missing error code in comment of nilfs_search_super_root
nilfs2: implement fallback for super root search
nilfs2: do not update log cursor for small change
nilfs2: add barrier mount option
nilfs2: add nodiscard mount option
nilfs2: use seq_puts to print mount options without argument
nilfs2: pass remount flag to parse_options
nilfs2: add sanity check in nilfs_btree_add_dirty_buffer
nilfs2: verify btree node after reading
nilfs2: get rid of private conversion macros on bmap key and pointer
nilfs2: remove constant qualifier from argument of bmap propagate
nilfs2: get rid of nilfs_direct uses
nilfs2: get rid of nilfs_btree uses
nilfs2: unify bmap set_target_v operations
nilfs2: get rid of nilfs_bmap_union
nilfs2: remove redundant pointer checks in bmap lookup functions
nilfs2: optimize calculation of min/max number of btree node children
nilfs2: reduce repetitive calculation of max number of child nodes
nilfs2: get maximum number of child nodes from bmap object
nilfs2: eliminate inline keywords in btree implementation
nilfs2: fix buffer head leak in nilfs_btnode_submit_block
nilfs2: add read ahead mode to nilfs_btnode_submit_block
nilfs2: add btree get block function with readahead option
nilfs2: introduce check flag to btree node buffer
nilfs2: apply read-ahead for nilfs_btree_lookup_contig
nilfs2: clarify byte offset in super block format
nilfs2: add feature set fields to super block
nilfs2: reject incompatible filesystem
nilfs2: simplify nilfs_get_page function
nilfs2: avoid rec_len overflow with 64KB block size
nilfs2: reject filesystem with unsupported block size

Documentation/filesystems/nilfs2.txt | 12 +-
fs/nilfs2/bmap.c | 6 +-
fs/nilfs2/bmap.h | 16 +-
fs/nilfs2/bmap_union.h | 42 --
fs/nilfs2/btnode.c | 23 +-
fs/nilfs2/btnode.h | 4 +-
fs/nilfs2/btree.c | 914 +++++++++++++++++++---------------
fs/nilfs2/btree.h | 12 +-
fs/nilfs2/dir.c | 33 +-
fs/nilfs2/direct.c | 96 ++---
fs/nilfs2/direct.h | 11 -
fs/nilfs2/gcinode.c | 17 +-
fs/nilfs2/mdt.c | 1 +
fs/nilfs2/nilfs.h | 22 +-
fs/nilfs2/page.c | 5 +-
fs/nilfs2/page.h | 2 +
fs/nilfs2/recovery.c | 348 +++++++------
fs/nilfs2/segbuf.h | 24 +-
fs/nilfs2/segment.c | 19 +-
fs/nilfs2/segment.h | 10 +-
fs/nilfs2/super.c | 333 +++++++++----
fs/nilfs2/the_nilfs.c | 161 +++++--
fs/nilfs2/the_nilfs.h | 23 +-
include/linux/nilfs2_fs.h | 67 ++-
24 files changed, 1295 insertions(+), 906 deletions(-)
delete mode 100644 fs/nilfs2/bmap_union.h
--
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Prev: [GIT PULL] block/IO bits for 2.6.36-rc1
Next: Resend: [PATCH] blkdev: fix blkdev_issue_zeroout return value