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authorJens Axboe <jens.axboe@oracle.com>2009-09-09 09:10:25 +0200
committerJens Axboe <jens.axboe@oracle.com>2009-09-11 09:20:26 +0200
commit500b067c5e6ceea49cf280a02597b1169320e08c (patch)
tree5e2e9bfd66f825f845fdf395b6303b884769ff6d /fs/fs-writeback.c
parentd993831fa7ffeb89e994f046f93eeb09ec91df08 (diff)
downloadop-kernel-dev-500b067c5e6ceea49cf280a02597b1169320e08c.zip
op-kernel-dev-500b067c5e6ceea49cf280a02597b1169320e08c.tar.gz
writeback: check for registered bdi in flusher add and inode dirty
Also a debugging aid. We want to catch dirty inodes being added to backing devices that don't do writeback. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs/fs-writeback.c')
-rw-r--r--fs/fs-writeback.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 2e601ce..da86ef5 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1046,6 +1046,14 @@ void __mark_inode_dirty(struct inode *inode, int flags)
*/
if (!was_dirty) {
struct bdi_writeback *wb = &inode_to_bdi(inode)->wb;
+ struct backing_dev_info *bdi = wb->bdi;
+
+ if (bdi_cap_writeback_dirty(bdi) &&
+ !test_bit(BDI_registered, &bdi->state)) {
+ WARN_ON(1);
+ printk(KERN_ERR "bdi-%s not registered\n",
+ bdi->name);
+ }
inode->dirtied_when = jiffies;
list_move(&inode->i_list, &wb->b_dirty);
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