Gitweb: http://git.kernel.org/linus/ce5f8e7795195edb6f84f74aa9d72e739df38486
Commit: ce5f8e7795195edb6f84f74aa9d72e739df38486
Parent: b6e51316daede0633e9274e1e30391cfa4747877
Author: Jens Axboe <jens.axboe@oracle.com>
AuthorDate: Mon Sep 14 12:57:56 2009 +0200
Committer: Jens Axboe <jens.axboe@oracle.com>
CommitDate: Wed Sep 16 15:18:52 2009 +0200
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>
---
mm/backing-dev.c | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index fd93566..3d3accb 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);
--
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