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Diffstat (limited to 'fs/btrfs/extent_io.c')
-rw-r--r--fs/btrfs/extent_io.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 3955e475ceec..4cd0ac983f91 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3458,7 +3458,7 @@ static int lock_extent_buffer_for_io(struct extent_buffer *eb,
static void end_extent_buffer_writeback(struct extent_buffer *eb)
{
clear_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
wake_up_bit(&eb->bflags, EXTENT_BUFFER_WRITEBACK);
}
@@ -4510,7 +4510,8 @@ static void check_buffer_tree_ref(struct extent_buffer *eb)
spin_unlock(&eb->refs_lock);
}
-static void mark_extent_buffer_accessed(struct extent_buffer *eb)
+static void mark_extent_buffer_accessed(struct extent_buffer *eb,
+ struct page *accessed)
{
unsigned long num_pages, i;
@@ -4519,7 +4520,8 @@ static void mark_extent_buffer_accessed(struct extent_buffer *eb)
num_pages = num_extent_pages(eb->start, eb->len);
for (i = 0; i < num_pages; i++) {
struct page *p = extent_buffer_page(eb, i);
- mark_page_accessed(p);
+ if (p != accessed)
+ mark_page_accessed(p);
}
}
@@ -4533,7 +4535,7 @@ struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
start >> PAGE_CACHE_SHIFT);
if (eb && atomic_inc_not_zero(&eb->refs)) {
rcu_read_unlock();
- mark_extent_buffer_accessed(eb);
+ mark_extent_buffer_accessed(eb, NULL);
return eb;
}
rcu_read_unlock();
@@ -4581,7 +4583,7 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
spin_unlock(&mapping->private_lock);
unlock_page(p);
page_cache_release(p);
- mark_extent_buffer_accessed(exists);
+ mark_extent_buffer_accessed(exists, p);
goto free_eb;
}
@@ -4596,7 +4598,6 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
attach_extent_buffer_page(eb, p);
spin_unlock(&mapping->private_lock);
WARN_ON(PageDirty(p));
- mark_page_accessed(p);
eb->pages[i] = p;
if (!PageUptodate(p))
uptodate = 0;