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page cache: use xa_lock

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Remove the address_space ->tree_lock and use the xa_lock newly added to
the radix_tree_root.  Rename the address_space ->page_tree to ->i_pages,
since we don't really care that it's a tree.

[[email protected]: fix nds32, fs/dax.c]
  Link: http://lkml.kernel.org/r/[email protected]: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox <[email protected]>
Acked-by: Jeff Layton <[email protected]>
Cc: Darrick J. Wong <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: Ryusuke Konishi <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Matthew Wilcox 2018-04-10 16:36:56 -07:00 • committed by Linus Torvalds
commit b93b016313
39 changed files with 345 additions and 366 deletions
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20
fs/nilfs2/btnode.c
View file

@ -193,9 +193,9 @@ retry:
(unsigned long long)oldkey,
(unsigned long long)newkey);
spin_lock_irq(&btnc->tree_lock);
err = radix_tree_insert(&btnc->page_tree, newkey, obh->b_page);
spin_unlock_irq(&btnc->tree_lock);
xa_lock_irq(&btnc->i_pages);
err = radix_tree_insert(&btnc->i_pages, newkey, obh->b_page);
xa_unlock_irq(&btnc->i_pages);
/*
* Note: page->index will not change to newkey until
* nilfs_btnode_commit_change_key() will be called.
@ -251,11 +251,11 @@ void nilfs_btnode_commit_change_key(struct address_space *btnc,
(unsigned long long)newkey);
mark_buffer_dirty(obh);
spin_lock_irq(&btnc->tree_lock);
radix_tree_delete(&btnc->page_tree, oldkey);
radix_tree_tag_set(&btnc->page_tree, newkey,
xa_lock_irq(&btnc->i_pages);
radix_tree_delete(&btnc->i_pages, oldkey);
radix_tree_tag_set(&btnc->i_pages, newkey,
PAGECACHE_TAG_DIRTY);
spin_unlock_irq(&btnc->tree_lock);
xa_unlock_irq(&btnc->i_pages);
opage->index = obh->b_blocknr = newkey;
unlock_page(opage);
@ -283,9 +283,9 @@ void nilfs_btnode_abort_change_key(struct address_space *btnc,
return;
if (nbh == NULL) { /* blocksize == pagesize */
spin_lock_irq(&btnc->tree_lock);
radix_tree_delete(&btnc->page_tree, newkey);
spin_unlock_irq(&btnc->tree_lock);
xa_lock_irq(&btnc->i_pages);
radix_tree_delete(&btnc->i_pages, newkey);
xa_unlock_irq(&btnc->i_pages);
unlock_page(ctxt->bh->b_page);
} else
brelse(nbh);

22
fs/nilfs2/page.c
View file

@ -331,15 +331,15 @@ repeat:
struct page *page2;
/* move the page to the destination cache */
spin_lock_irq(&smap->tree_lock);
page2 = radix_tree_delete(&smap->page_tree, offset);
xa_lock_irq(&smap->i_pages);
page2 = radix_tree_delete(&smap->i_pages, offset);
WARN_ON(page2 != page);
smap->nrpages--;
spin_unlock_irq(&smap->tree_lock);
xa_unlock_irq(&smap->i_pages);
spin_lock_irq(&dmap->tree_lock);
err = radix_tree_insert(&dmap->page_tree, offset, page);
xa_lock_irq(&dmap->i_pages);
err = radix_tree_insert(&dmap->i_pages, offset, page);
if (unlikely(err < 0)) {
WARN_ON(err == -EEXIST);
page->mapping = NULL;
@ -348,11 +348,11 @@ repeat:
page->mapping = dmap;
dmap->nrpages++;
if (PageDirty(page))
radix_tree_tag_set(&dmap->page_tree,
radix_tree_tag_set(&dmap->i_pages,
offset,
PAGECACHE_TAG_DIRTY);
}
spin_unlock_irq(&dmap->tree_lock);
xa_unlock_irq(&dmap->i_pages);
}
unlock_page(page);
}
@ -474,15 +474,15 @@ int __nilfs_clear_page_dirty(struct page *page)
struct address_space *mapping = page->mapping;
if (mapping) {
spin_lock_irq(&mapping->tree_lock);
xa_lock_irq(&mapping->i_pages);
if (test_bit(PG_dirty, &page->flags)) {
radix_tree_tag_clear(&mapping->page_tree,
radix_tree_tag_clear(&mapping->i_pages,
page_index(page),
PAGECACHE_TAG_DIRTY);
spin_unlock_irq(&mapping->tree_lock);
xa_unlock_irq(&mapping->i_pages);
return clear_page_dirty_for_io(page);
}
spin_unlock_irq(&mapping->tree_lock);
xa_unlock_irq(&mapping->i_pages);
return 0;
}
return TestClearPageDirty(page);