-readpage() does page_lock() before extent_lock(), we do the opposite in
extent-same. We want to reverse the order in btrfs_extent_same() but it's
not quite straightforward since the page locks are taken inside
btrfs_cmp_data().
So I split btrfs_cmp_data() into 3 parts with a small context
-readpage() does page_lock() before extent_lock(), we do the opposite in
extent-same. We want to reverse the order in btrfs_extent_same() but it's
not quite straightforward since the page locks are taken inside
btrfs_cmp_data().
So I split btrfs_cmp_data() into 3 parts with a small context
On Tue, Jun 23, 2015 at 02:28:37PM -0700, Mark Fasheh wrote:
-readpage() does page_lock() before extent_lock(), we do the opposite in
extent-same. We want to reverse the order in btrfs_extent_same() but it's
not quite straightforward since the page locks are taken inside
btrfs_cmp_data().
-readpage() does page_lock() before extent_lock(), we do the opposite in
extent-same. We want to reverse the order in btrfs_extent_same() but it's
not quite straightforward since the page locks are taken inside
btrfs_cmp_data().
So I split btrfs_cmp_data() into 3 parts with a small context
-readpage() does page_lock() before extent_lock(), we do the opposite in
extent-same. We want to reverse the order in btrfs_extent_same() but it's
not quite straightforward since the page locks are taken inside
btrfs_cmp_data().
So I split btrfs_cmp_data() into 3 parts with a small context
