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Date: Sun, 28 Sep 2008 13:16:49 +0800 From: Tao Ma <tao.ma@...cle.com> To: Mark Fasheh <mfasheh@...e.com> CC: linux-kernel@...r.kernel.org, joel.becker@...cle.com, ocfs2-devel@....oracle.com, linux-fsdevel@...r.kernel.org Subject: Re: [PATCH 0/39] Ocfs2 updates for 2.6.28 Hi Mark, do you see my 2 patches for xattr? http://oss.oracle.com/pipermail/ocfs2-devel/2008-September/002839.html this is pretty straightforward and I think it can be committed with it. http://oss.oracle.com/pipermail/ocfs2-devel/2008-September/002839.html this is the new support for empty bucket. Regards, Tao Mark Fasheh wrote: > Hi, > > The following patches comprise the bulk of Ocfs2 updates for the > 2.6.28 merge window. They can roughly be broken up into 4 sets which add > incremental features to Ocfs2. The patches are presented as they come in > git. > > > EA Support > > The largest set adds support for extended attributes in Ocfs2. Extended > attributes are stored both within the inode block, and externally, when their > numbers grow. Individual attributes can be arbitrarily sized. Smaller ones > have their data stored inline. Larger attributes grow out to a btree. In > theory the btrees have similar limits to inode data. In practice though, the > VFS limits EA sizes to 64K. > > When inode space for attributes run low, new ones are created in an external > disk block. When the block fills up, external attributes are moved to an > indexed btree. The btree can store many thousands of attributes, if needed. > > The patches leading up to EA support further abstracted portions of the Ocfs2 > btree code. Ultimately, this means we can "add" a btree to any Ocfs2 structure > by embedding a header, and providing the proper callbacks to manipulate > certain key fields. The xattr code makes use of this, as will future Ocfs2 > features. > > Joel made some further improvements to our 'generic' (for Ocfs2 at least) > btree support which completed the interface by cleaning things up and > providing for proper callbacks in a static operations structure. Those patches > follow the xattr series as they were developed afterwards. > > > JBD2 Support > > Ocfs2 can now use JBD2. Amongst other benefits, this allows us to support > large block devices with more than 32 bits worth of block numbers. As a part > of these patches, and 'inode64' mount option is added which toggles creation > of inodes whose inode number requires more than 32 bits to be adequately > described. > > JBD2 support in Ocfs2 is compiled in by default, however since journaling is > so central to the operation of a file system, we kept our 'legacy' JBD > support. We did this to provide a fallback for any users who might hit a > problem, while we fix it. Legacy JBD support will be removed from Ocfs2 in > 2.6.29. > > > Cluster Aware POSIX File Locks > > This was added via the 'plock' interface which Dave Teigland pulled into > fs/dlm last merge window. The majority of the support is actually provided in > userspace via the dlm_controld. As a result, cluster-aware POSIX locks only > work for userspace cluster stacks right now. > > > Local Alloc Throttling > > These patches allow the "local alloc" file in Ocfs2 to throttle back the > number of free disk blocks it caches. This is done during times of extreme > fragmentation, or very low disk space. The traditional behavior was to > completely disable the local alloc feature, which resulted in performance > problems on some corner cases. The throttling has increased performance by 10 > times during such situations. > > > Please pull from 'merge_window' branch of > git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2.git merge_window > > to receive the following updates: > > Documentation/filesystems/ocfs2.txt | 4 + > fs/Kconfig | 40 +- > fs/ocfs2/Makefile | 5 +- > fs/ocfs2/alloc.c | 857 +++++-- > fs/ocfs2/alloc.h | 86 +- > fs/ocfs2/aops.c | 49 +- > fs/ocfs2/cluster/masklog.c | 1 + > fs/ocfs2/cluster/masklog.h | 1 + > fs/ocfs2/dir.c | 26 +- > fs/ocfs2/extent_map.c | 60 + > fs/ocfs2/extent_map.h | 3 + > fs/ocfs2/file.c | 313 +-- > fs/ocfs2/file.h | 32 +- > fs/ocfs2/inode.c | 28 +- > fs/ocfs2/inode.h | 4 + > fs/ocfs2/journal.c | 72 +- > fs/ocfs2/journal.h | 52 +- > fs/ocfs2/localalloc.c | 362 +++- > fs/ocfs2/localalloc.h | 4 + > fs/ocfs2/locks.c | 15 + > fs/ocfs2/locks.h | 1 + > fs/ocfs2/namei.c | 13 +- > fs/ocfs2/ocfs2.h | 56 +- > fs/ocfs2/ocfs2_fs.h | 220 ++- > fs/ocfs2/ocfs2_jbd_compat.h | 82 + > fs/ocfs2/stack_user.c | 33 + > fs/ocfs2/stackglue.c | 20 + > fs/ocfs2/stackglue.h | 19 + > fs/ocfs2/suballoc.c | 205 ++- > fs/ocfs2/suballoc.h | 26 +- > fs/ocfs2/super.c | 59 +- > fs/ocfs2/symlink.c | 9 + > fs/ocfs2/uptodate.c | 38 +- > fs/ocfs2/uptodate.h | 3 + > fs/ocfs2/xattr.c | 4851 +++++++++++++++++++++++++++++++++++ > fs/ocfs2/xattr.h | 68 + > fs/ocfs2/xattr_trusted.c | 82 + > fs/ocfs2/xattr_user.c | 94 + > 38 files changed, 7271 insertions(+), 622 deletions(-) > create mode 100644 fs/ocfs2/ocfs2_jbd_compat.h > create mode 100644 fs/ocfs2/xattr.c > create mode 100644 fs/ocfs2/xattr.h > create mode 100644 fs/ocfs2/xattr_trusted.c > create mode 100644 fs/ocfs2/xattr_user.c > > Joel Becker (15): > ocfs2: Prefix the extent tree operations structure. > ocfs2: Prefix the ocfs2_extent_tree structure. > ocfs2: Make ocfs2_extent_tree get/put instead of alloc. > ocfs2: Make 'private' into 'object' on ocfs2_extent_tree. > ocfs2: Provide the get_root_el() method to ocfs2_extent_tree_operations. > ocfs2: Use struct ocfs2_extent_tree in ocfs2_num_free_extents(). > ocfs2: Determine an extent tree's max_leaf_clusters in an et_op. > ocfs2: Create specific get_extent_tree functions. > ocfs2: Add an insertion check to ocfs2_extent_tree_operations. > ocfs2: Make ocfs2_extent_tree the first-class representation of a tree. > ocfs2: Comment struct ocfs2_extent_tree_operations. > ocfs2: Change ocfs2_get_*_extent_tree() to ocfs2_init_*_extent_tree() > ocfs2: Limit inode allocation to 32bits. > ocfs2: Add the 'inode64' mount option. > ocfs2: Switch over to JBD2. > > Mark Fasheh (5): > ocfs2: POSIX file locks support > ocfs2: Track local alloc bits internally > ocfs2: throttle back local alloc when low on disk space > ocfs2: track local alloc state via debugfs > ocfs2: fix printk format warnings > > Sunil Mushran (1): > ocfs2: Add xattr mount option in ocfs2_show_options() > > Tao Ma (15): > ocfs2: Modify ocfs2_num_free_extents for future xattr usage. > ocfs2: Use ocfs2_extent_list instead of ocfs2_dinode. > ocfs2: Abstract ocfs2_extent_tree in b-tree operations. > ocfs2: Make high level btree extend code generic > ocfs2: Add the basic xattr disk layout in ocfs2_fs.h > ocfs2: Add helper function in uptodate.c for removing xattr clusters > ocfs2: Add extent tree operation for xattr value btrees > ocfs2: Add xattr index tree operations > ocfs2: Add xattr bucket iteration for large numbers of EAs > ocfs2: Add xattr lookup code xattr btrees > ocfs2: Optionally limit extent size in ocfs2_insert_extent() > ocfs2: Enable xattr set in index btree > ocfs2: Delete all xattr buckets during inode removal > ocfs2: bug-fix for journal extend in xattr. > ocfs2: Resolve deadlock in ocfs2_xattr_free_block. > > Tiger Yang (3): > ocfs2: reserve inline space for extended attribute > ocfs2: Add extended attribute support > ocfs2: Add incompatible flag for extended attribute > > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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