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| author | Matthew Wilcox <mawilcox@microsoft.com> | 2018-04-10 16:36:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-11 10:28:39 -0700 |
| commit | b93b016313b3ba8003c3b8bb71f569af91f19fc7 (patch) | |
| tree | ad4be96414189dcdf8c972f351ba430996e9fdff /mm/huge_memory.c | |
| parent | f6bb2a2c0b81c47282ddb7883f92e65a063c27dd (diff) | |
| download | lwn-b93b016313b3ba8003c3b8bb71f569af91f19fc7.tar.gz lwn-b93b016313b3ba8003c3b8bb71f569af91f19fc7.zip | |
page cache: use xa_lock
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.
[willy@infradead.org: fix nds32, fs/dax.c]
Link: http://lkml.kernel.org/r/20180406145415.GB20605@bombadil.infradead.orgLink: http://lkml.kernel.org/r/20180313132639.17387-9-willy@infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 3f3267af4e3b..14ed6ee5e02f 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2450,7 +2450,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, } else { /* Additional pin to radix tree */ page_ref_add(head, 2); - spin_unlock(&head->mapping->tree_lock); + xa_unlock(&head->mapping->i_pages); } spin_unlock_irqrestore(zone_lru_lock(page_zone(head)), flags); @@ -2658,15 +2658,15 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) if (mapping) { void **pslot; - spin_lock(&mapping->tree_lock); - pslot = radix_tree_lookup_slot(&mapping->page_tree, + xa_lock(&mapping->i_pages); + pslot = radix_tree_lookup_slot(&mapping->i_pages, page_index(head)); /* * Check if the head page is present in radix tree. * We assume all tail are present too, if head is there. */ if (radix_tree_deref_slot_protected(pslot, - &mapping->tree_lock) != head) + &mapping->i_pages.xa_lock) != head) goto fail; } @@ -2700,7 +2700,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) } spin_unlock(&pgdata->split_queue_lock); fail: if (mapping) - spin_unlock(&mapping->tree_lock); + xa_unlock(&mapping->i_pages); spin_unlock_irqrestore(zone_lru_lock(page_zone(head)), flags); unfreeze_page(head); ret = -EBUSY; |