So, currently, reiser4 depends on the core patches listed below. Would
you please look over them and let us know which look reasonable and
which are to be eliminated.

reiser4-sb_sync_inodes.patch
This patch adds new operation (sync_inodes) to struct super_operations.
This operation allows a filesystem to writeout dirty pages not
necessarily on per-inode basis. Default implementation of this operation
is sync_sb_inodes.

ok.

reiser4-allow-drop_inode-implementation.patch
This EXPORT_SYMBOL-s inodes_stat, generic_forget_inode, destroy_inode
and wake_up_inode which are needed to implement drop_inode.
reiser4 implements function similar to generic_delete_inode to be able
to truncate inode pages together with metadata destroying in
reiser4_delete_inode whereas generic_delete_inode first truncates pages
and then calls foofs_delete_inode.

Not okay.  I though I explained you how to do it instead already?

reiser4-truncate_inode_pages_range.patch
This patch makes truncate_inode_pages_range from truncate_inode_pages.
truncate_inode_pages_range can truncate only pages which fall into
specified range. truncate_inode_pages which trucates all pages starting
from specified offset is made a one liner which calls
truncate_inode_pages_range.

Ok.

reiser4-rcu-barrier.patch
This patch introduces a new interface - rcu_barrier() which waits until
all the RCUs queued until this call have been completed.
This patch is by Dipankar Sarma [off-list ref]

No idea, but if Dipankar things it's okay it probably is.

reiser4-reget-page-mapping.patch
This patch allows to remove page from page cache in foofs_releasepage.

probably ok, Andrew?

reiser4-radix_tree_lookup_slot.patch
This patch extents radxi tree API with a function which returns pointer
to found item within the tree.

Idea is okay, implementation needs work:

__lookup_slot should be called radix_tree_lookup_slot and exported direcly.

radix_tree_lookup should be an inlined wrapper in the header, and kill
the != NULL comparims, it's superflous:

static inline void *radix_tree_lookup(struct radix_tree_root *root,
		unsigned long index)
{
	void **slot = radix_tree_lookup_slot(root, index);
	return slot ? *slot : NULL;
}

reiser4-export-remove_from_page_cache.patch

Probably okay, but why do you need both remove_from_page_cache
and __remove_from_page_cache?

reiser4-export-page_cache_readahead.patch

ok

reiser4-export-pagevec-funcs.patch

ok

reiser4-export-radix_tree_preload.patch

this one is nasty.  not your fault though, but why do we even
have global radix-tree preloads instead of pools.  What do you
need it for?

reiser4-export-find_get_pages.patch

Why don't you use pagevecs instead?

reiser4-export-generic_sync_sb_inodes.patch

Can't find this one in current -mm

reiser4-export-inode_lock.patch
Reiser4 used to manipulate with super block inode lists so it needs
inode_lock exported.
We are working now to not need this. But quite many things are based on
it. Is there any chance to have it included?

No.  Modules must not look at inode_lock, it's far too much of an
implementation detail.
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