Bug 216191

Summary:	Debugfs directory already present complaints appear in kernel log
Product:	IO/Storage	Reporter:	Bart Van Assche (bvanassche)
Component:	Block Layer	Assignee:	Jens Axboe (axboe)
Status:	RESOLVED UNREPRODUCIBLE
Severity:	normal
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	v5.19-rc1	Subsystem:
Regression:	No	Bisected commit-id:

Description Bart Van Assche 2022-06-29 21:41:00 UTC

Debugfs complaints appear in the kernel log while running blktests. I think this is a regression.

# ~bvanassche/software/tools/logs-since-boot | sed -n 's/.*debugfs: //p'|grep 'already present'
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sde' with parent 'block' already present!
Directory 'sdf' with parent 'block' already present!
Directory 'sdd' with parent 'block' already present!
Directory 'sdc' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr5' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr5' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory 'sr1' with parent 'block' already present!
Directory 'sr2' with parent 'block' already present!
Directory 'sr3' with parent 'block' already present!
Directory 'sr4' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '1' with parent 'block' already present!
Directory '0' with parent 'block' already present!
Directory '1' with parent 'block' already present!

Comment 1 Bart Van Assche 2022-06-30 00:09:41 UTC

A correction: I see the reported behavior with Jens' for-next branch but not with v5.19-rc1.

The first "directory already present" message was logged after blktests test block/001 was started.

Comment 2 Jens Axboe 2022-06-30 01:14:40 UTC

Can you send a report to the list and CC Christoph? Might be useful to
bisect for-5.20/block, if this is easy to test?

Comment 3 Bart Van Assche 2022-07-07 23:55:49 UTC

I tried to reproduce this behavior today with commit 6c0d138a4e13 ("Merge branch 'for-5.20/drivers' into for-next") but without success. Let's close this bug and reopen it if this behavior would reappear.