[LU-15477] osc_extent_wait() deadlock

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Severity: 3
• Assignee: Andriy Skulysh
• Reporter: Andriy Skulysh

Description

Thread 1:

__schedule
schedule
osc_extent_wait
osc_extent_find
osc_queue_async_io
osc_page_cache_add
osc_io_commit_async
cl_io_commit_async
lov_io_commit_async
cl_io_commit_async
vvp_io_write_commit
vvp_io_write_start
cl_io_start
cl_io_loop
ll_file_io_generic
ll_file_write_iter
new_sync_write
__vfs_write
vfs_write
ksys_write
__x64_sys_write
do_syscall_64
entry_SYSCALL_64_after_hwframe
Progs:  4747 "IOR" 4749 "IOR"

Thread 2:

__schedule
schedule
io_schedule
__lock_page
vvp_page_make_ready_start
cl_page_make_ready_start
osc_extent_make_ready
osc_extent_finish
brw_interpret
ptlrpc_check_set
ptlrpcd_check
ptlrpcd
kthread
ret_from_fork
Progs:  12707 "ptlrpcd_00_04"

We must not hold a page lock while we do osc_extent_find()

Comments

[Peter Jones]

Landed for 2.15

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/46281/
Subject: LU-15477 osc: osc_extent_wait() deadlock
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 821a8d7b481d34a54044dfe871e4532f0996de8a

[Gerrit Updater]

"Andriy Skulysh <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/46281
Subject: LU-15477 osc: osc_extent_wait() deadlock
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: c8de30754411db7221af5242c7cc0b3f1cad1c3d