- 21 Oct, 2018 40 commits
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Matthew Wilcox authored
The page cache was the only user of this interface and it has now been converted to the XArray. Transform the test into a test of xas_init_marks(). Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
This function was only used by the page cache which is now converted to the XArray. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
radix_tree_split and radix_tree_join were never used upstream. Remove them; if they're needed in future they will be replaced by XArray equivalents. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
The only user of this functionality was the workingset code, and it's now been converted to the XArray. Remove __radix_tree_delete_node() entirely as it was also only used by the workingset code. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
With no more radix tree API users left, we can drop the GFP flags and use xa_init() instead of INIT_RADIX_TREE(). Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
This is the last part of DAX to be converted to the XArray so remove all the old helper functions. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Instead of always retrying when we slept, only retry if the page has moved. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Use XArray iteration instead of a pagevec. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Avoids walking the radix tree multiple times looking for tags. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Instead of using a pagevec, just use the XArray iterators. Add a conditional rescheduling point which probably should have been there in the original. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Add some XArray-based helper functions to replace the radix tree based metaphors currently in use. The biggest change is that converted code doesn't see its own lock bit; get_unlocked_entry() always returns an entry with the lock bit clear. So we don't have to mess around loading the current entry and clearing the lock bit; we can just store the unlocked entry that we already have. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Since the XArray is embedded in the struct address_space, its address contains exactly as much entropy as the address of the mapping. This patch is purely preparatory for later patches which will simplify the wait/wake interfaces. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Remove mentions of 'radix' and 'radix tree'. Simplify some names by dropping the word 'mapping'. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
This is a straightforward conversion. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
This is close to a 1:1 replacement of radix tree APIs with their XArray equivalents. It would be possible to optimise nilfs_copy_back_pages(), but that doesn't seem to be in the performance path. Also, I think it has a pre-existing bug, and I've added a note to that effect in the source code. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
A couple of short loops. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Mostly comment fixes, but one use of __xa_set_mark. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Signed-off-by: Matthew Wilcox <willy@infradead.org> Acked-by: David Sterba <dsterba@suse.com>
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Matthew Wilcox authored
Remove the last mentions of radix tree from various comments. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Switch to a batch-processing model like memfd_wait_for_pins() and use the xa_state previously set up by memfd_wait_for_pins(). Signed-off-by: Matthew Wilcox <willy@infradead.org> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
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Matthew Wilcox authored
Simplify the locking by taking the spinlock while we walk the tree on the assumption that many acquires and releases of the lock will be worse than holding the lock while we process an entire batch of pages. Signed-off-by: Matthew Wilcox <willy@infradead.org> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
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Matthew Wilcox authored
Simpler code because the xarray takes care of things like the limit and dereferencing the slot. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Since we are conditionally storing NULL in the XArray, we do not need to allocate memory and the GFP flags will be unused. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
xa_find() is a slightly easier API to use than radix_tree_gang_lookup_slot() because it contains its own RCU locking. This commit removes the last user of radix_tree_gang_lookup_slot() so remove the function too. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
We can use xas_find_conflict() instead of radix_tree_gang_lookup_slot() to find any conflicting entry and combine the three paths through this function into one. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
This is a 1:1 conversion. The major part of this patch is converting the test framework from userspace to kernel space and mirroring the algorithm now used in find_swap_entry(). Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
xa_load has its own RCU locking, so we can eliminate it here. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Rename shmem_radix_tree_replace() to shmem_replace_entry() and convert it to use the XArray API. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Removes sparse warnings. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
This is just a variable rename and comment change. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Slightly shorter and easier to read code. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
I found another victim of the radix tree being hard to use. Because there was no call to radix_tree_preload(), khugepaged was allocating radix_tree_nodes using GFP_ATOMIC. I also converted a local_irq_save()/restore() pair to disable()/enable(). Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Quite a straightforward conversion. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
This one is trivial. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Both callers of __delete_from_swap_cache have the swp_entry_t already, so pass that in to make constructing the XA_STATE easier. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Combine __add_to_swap_cache and add_to_swap_cache into one function since there is no more need to preload. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
This is essentially xa_cmpxchg() with the locking handled above us, and it doesn't have to handle replacing a NULL entry. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
We construct an XA_STATE and use it to delete the node with xas_store() rather than adding a special function for this unique use case. Includes a test that simulates this usage for the test suite. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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Matthew Wilcox authored
Includes moving mapping_tagged() to fs.h as a static inline, and changing it to return bool. Signed-off-by: Matthew Wilcox <willy@infradead.org>
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