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So the regression is from 153-->154 update. And I think that is due to nfs backports we had in 5.15.154. >> >> # ./runltp -d /tmpdir -s fcntl17 >> >> <<>> >> tag=fcntl17 stime=1712915065 ... >> fcntl17 1 TFAIL : fcntl17.c:429: Alarm expired, deadlock not detected >> fcntl17 0 TWARN : fcntl17.c:430: You may need to kill child processes by hand >> fcntl17 2 TPASS : Block 1 PASSED >> fcntl17 0 TINFO : Exit block 1 >> fcntl17 0 TWARN : tst_tmpdir.c:342: tst_rmdir: rmobj(/tmpdir/ltp-jRFBtBQhhx/LTP_fcn9Xy4hM) failed: unlink(/tmpdir/ltp-jRFBtBQhhx/LTP_fcn9Xy4hM) failed; errno=2: ENOENT >> >> >> Steps used after installing latest ltp: >> >> $ mkdir /tmpdir >> $ yum install nfs-utils -y >> $ echo "/media *(rw,no_root_squash,sync)" >/etc/exports >> $ systemctl start nfs-server.service >> $ mount -o rw,nfsvers=3 127.0.0.1:/media /tmpdir >> $ cd /opt/ltp >> $ ./runltp -d /tmpdir -s fcntl17 >> >> >> >> This does not happen in 5.15.153 tag. >> >> Adding nfs people to the CC list > > The reproducer uses NFSv3, but the bug report says NFSv4 > at the top. > > I was able to reproduce this on my nfsd-5.15.y branch > with NFSv3. > > A bisect would be most helpful. > I was able to bisect: here are the results: 2267b2e84593bd3d61a1188e68fba06307fa9dab is the first bad commit commit 2267b2e84593bd3d61a1188e68fba06307fa9dab Author: Alexander Aring Date: Tue Sep 12 17:53:18 2023 -0400 lockd: introduce safe async lock op [ Upstream commit 2dd10de8e6bcbacf85ad758b904543c294820c63 ] This patch reverts mostly commit 40595cdc93ed ("nfs: block notification on fs with its own ->lock") and introduces an EXPORT_OP_ASYNC_LOCK export flag to signal that the "own ->lock" implementation supports async lock requests. The only main user is DLM that is used by GFS2 and OCFS2 filesystem. Those implement their own lock() implementation and return FILE_LOCK_DEFERRED as return value. Since commit 40595cdc93ed ("nfs: block notification on fs with its own ->lock") the DLM implementation were never updated. This patch should prepare for DLM to set the EXPORT_OP_ASYNC_LOCK export flag and update the DLM plock implementation regarding to it. Acked-by: Jeff Layton Signed-off-by: Alexander Aring Signed-off-by: Chuck Lever Documentation/filesystems/nfs/exporting.rst | 7 +++++++ fs/lockd/svclock.c | 4 +--- fs/nfsd/nfs4state.c | 10 +++++++--- include/linux/exportfs.h | 14 ++++++++++++++ 4 files changed, 29 insertions(+), 6 deletions(-) Bisect log: ========== git bisect start # status: waiting for both good and bad commits # bad: [cdfd0a7f01396303e9d4fb3513a1127636f12e5e] Linux 5.15.154 git bisect bad cdfd0a7f01396303e9d4fb3513a1127636f12e5e # status: waiting for good commit(s), bad commit known # good: [9465fef4ae351749f7068da8c78af4ca27e61928] Linux 5.15.153 git bisect good 9465fef4ae351749f7068da8c78af4ca27e61928 # good: [4420d19ed4e4fe2adc9bed8a49bf195db1137458] NFSD: Report average age of filecache items git bisect good 4420d19ed4e4fe2adc9bed8a49bf195db1137458 # good: [94e412c945e64579798204aee7bc669d0acfaf79] nfsd: fix courtesy client with deny mode handling in nfs4_upgrade_open git bisect good 94e412c945e64579798204aee7bc669d0acfaf79 # bad: [254f1c2521716cafc63530750ce313059f5d5979] iwlwifi: mvm: rfi: use kmemdup() to replace kzalloc + memcpy git bisect bad 254f1c2521716cafc63530750ce313059f5d5979 # bad: [e635f652696ef6f1230621cfd89c350cb5ec6169] serial: sc16is7xx: convert from _raw_ to _noinc_ regmap functions for FIFO git bisect bad e635f652696ef6f1230621cfd89c350cb5ec6169 # good: [05b452e8748bcf92c00725691437e16d46af7c28] nfsd: Fix creation time serialization order git bisect good 05b452e8748bcf92c00725691437e16d46af7c28 # bad: [ccd9fe71b9ee46ebcecec8aec5c4f1e1ddd35dfd] nfsd: Fix a regression in nfsd_setattr() git bisect bad ccd9fe71b9ee46ebcecec8aec5c4f1e1ddd35dfd # bad: [2267b2e84593bd3d61a1188e68fba06307fa9dab] lockd: introduce safe async lock op git bisect bad 2267b2e84593bd3d61a1188e68fba06307fa9dab # good: [56e5eeff6cfa4bd6ffa2b2ae5b8bfc1c28044faf] nfsd: separate nfsd_last_thread() from nfsd_put() git bisect good 56e5eeff6cfa4bd6ffa2b2ae5b8bfc1c28044faf # good: [6e5fed48d8b7b25f8517a1292b62a3a86a5aec91] NFSD: fix possible oops when nfsd/pool_stats is closed. git bisect good 6e5fed48d8b7b25f8517a1292b62a3a86a5aec91 # first bad commit: [2267b2e84593bd3d61a1188e68fba06307fa9dab] lockd: introduce safe async lock op Hope the above might help. I didnot test the revert of culprit commit on top of 5.15.154 yet. Thanks, Harshit