Btrfs: btrfs_release_extent_buffer_page didn't free pages of dummy extent

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btrfs_release_extent_buffer_page() can't handle dummy extent that
allocated by btrfs_clone_extent_buffer() properly. That is because
reference count of pages that allocated by btrfs_clone_extent_buffer()
was 2, 1 by alloc_page(), and another by attach_extent_buffer_page().

Running following command repeatly can check this memory leak problem

    btrfs inspect-internal inode-resolve 256 /mnt/btrfs

Signed-off-by: Chien-Kuan Yeh <ckya@synology.com>
Signed-off-by: Forrest Liu <forrestl@synology.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>

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Forrest Liu 2015-02-09 17:31:45 +08:00 • committed by Chris Mason

parent 6e17d30bfa

commit 5d2361db48

1 changed files with 26 additions and 25 deletions

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fs/btrfs/extent_io.c

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