Messages in this thread Patch in this message | | | From | Jens Axboe <> | Subject | [PATCH 7/7] writeback: splice dirty inode entries to default bdi on bdi_destroy() | Date | Mon, 14 Sep 2009 11:36:34 +0200 |
| |
We cannot safely ensure that the inodes are all gone at this point in time, and we must not destroy this bdi with inodes having off it. So just splice our entries to the default bdi since that one will always persist.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com> --- mm/backing-dev.c | 12 +++++++++++- 1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index fd93566..27f82dc 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -668,7 +668,17 @@ void bdi_destroy(struct backing_dev_info *bdi) { int i; - WARN_ON(bdi_has_dirty_io(bdi)); + /* + * Splice our entries to the default_backing_dev_info, if this + * bdi disappears + */ + if (bdi_has_dirty_io(bdi)) { + struct bdi_writeback *dst = &default_backing_dev_info.wb; + + list_splice(&bdi->wb.b_dirty, &dst->b_dirty); + list_splice(&bdi->wb.b_io, &dst->b_io); + list_splice(&bdi->wb.b_more_io, &dst->b_more_io); + } bdi_unregister(bdi); -- 1.6.4.1.207.g68ea
| |