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authorJens Axboe <jens.axboe@oracle.com>2009-09-14 12:57:56 +0200
committerJens Axboe <jens.axboe@oracle.com>2009-09-16 15:18:52 +0200
commitce5f8e7795195edb6f84f74aa9d72e739df38486 (patch)
treef8d5a3a18d70b49b2c9bbe47f62c908e8eda9c64 /mm/backing-dev.c
parentb6e51316daede0633e9274e1e30391cfa4747877 (diff)
downloadconfigs-ce5f8e7795195edb6f84f74aa9d72e739df38486.tar.gz
writeback: splice dirty inode entries to default bdi on bdi_destroy()
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>
Diffstat (limited to 'mm/backing-dev.c')
-rw-r--r--mm/backing-dev.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index fd93566345b..3d3accb1f80 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -668,7 +668,19 @@ 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;
+
+ spin_lock(&inode_lock);
+ 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);
+ spin_unlock(&inode_lock);
+ }
bdi_unregister(bdi);