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Trond Myklebust c77e22834a NFSv4: Fix a potential sleep while atomic in nfs4_do_reclaim() 
John Hubbard reports seeing the following stack trace:

nfs4_do_reclaim
   rcu_read_lock /* we are now in_atomic() and must not sleep */
       nfs4_purge_state_owners
           nfs4_free_state_owner
               nfs4_destroy_seqid_counter
                   rpc_destroy_wait_queue
                       cancel_delayed_work_sync
                           __cancel_work_timer
                               __flush_work
                                   start_flush_work
                                       might_sleep:
                                        (kernel/workqueue.c:2975: BUG)

The solution is to separate out the freeing of the state owners
from nfs4_purge_state_owners(), and perform that outside the atomic
context.

Reported-by: John Hubbard <jhubbard@nvidia.com>
Fixes: 0aaaf5c424c7f ("NFS: Cache state owners after files are closed")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-08-04 22:35:40 -04:00
..
blocklayout
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
filelayout
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
flexfilelayout
pnfs/flexfiles: Add tracepoints for detecting pnfs fallback to MDS
2019-07-18 15:50:28 -04:00
cache_lib.c
NFS client updates for Linux 4.15
2017-11-17 14:18:00 -08:00
cache_lib.h
NFS client updates for Linux 4.15
2017-11-17 14:18:00 -08:00
callback_proc.c
NFS4: Add a trace event to record invalid CB sequence IDs
2019-07-09 10:30:25 -04:00
callback_xdr.c
SUNRPC/nfs: Fix return value for nfs4_callback_compound()
2019-04-24 09:46:34 -04:00
callback.c
SUNRPC: Cache the process user cred in the RPC server listener
2019-04-24 09:46:35 -04:00
callback.h
NFS CB_OFFLOAD xdr
2018-08-09 12:56:38 -04:00
client.c
NFS: Cleanup if nfs_match_client is interrupted
2019-07-06 14:54:53 -04:00
delegation.c
NFSv4.1: Only reap expired delegations
2019-08-04 22:35:40 -04:00
delegation.h
NFSv4: Fix delegation state recovery
2019-08-04 22:35:40 -04:00
dir.c
Revert "NFS: readdirplus optimization by cache mechanism" (memleak)
2019-07-12 16:01:37 -04:00
direct.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
dns_resolve.c
keys: Pass the network namespace into request_key mechanism
2019-06-27 23:02:12 +01:00
dns_resolve.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
export.c
NFS: Pass the inode down to the getattr() callback
2018-06-04 12:07:07 -04:00
file.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
fscache-index.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
fscache.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
fscache.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
getroot.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inode.c
Merge branch 'containers'
2019-07-06 14:54:52 -04:00
internal.h
Revert "NFS: readdirplus optimization by cache mechanism" (memleak)
2019-07-12 16:01:37 -04:00
io.c
NFS: Fix up documentation warnings
2019-02-20 15:14:21 -05:00
iostat.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Kconfig
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
Makefile
NFS: Create a root NFS directory in /sys/fs/nfs
2019-07-06 14:54:49 -04:00
mount_clnt.c
SUNRPC: Cache cred of process creating the rpc_client
2019-04-26 16:00:48 -04:00
namespace.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
netns.h
NFS: Add sysfs support for per-container identifier
2019-07-06 14:54:49 -04:00
nfs2super.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
nfs2xdr.c
NFS: Record task, client ID, and XID in xdr_status trace points
2019-07-09 10:30:25 -04:00
nfs3_fs.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nfs3acl.c
nfs: fix xfstest generic/099 failed on nfsv3
2019-02-20 17:33:55 -05:00
nfs3client.c
pNFS: Allow multiple connections to the DS
2019-07-06 14:54:50 -04:00
nfs3proc.c
NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.
2018-12-19 13:52:46 -05:00
nfs3super.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
nfs3xdr.c
NFS: Record task, client ID, and XID in xdr_status trace points
2019-07-09 10:30:25 -04:00
nfs4_fs.h
NFSv4: Fix a potential sleep while atomic in nfs4_do_reclaim()
2019-08-04 22:35:40 -04:00
nfs4client.c
NFSv4: Fix a potential sleep while atomic in nfs4_do_reclaim()
2019-08-04 22:35:40 -04:00
nfs4file.c
NFS client updates for Linux 5.3
2019-07-18 14:32:33 -07:00
nfs4getroot.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nfs4idmap.c
Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"
2019-07-10 18:43:43 -07:00
nfs4idmap.h
NFS: Move nfs_idmap.h into fs/nfs/
2015-04-23 15:16:14 -04:00
nfs4namespace.c
NFS: Fix up documentation warnings
2019-02-20 15:14:21 -05:00
nfs4proc.c
NFSv4: Check the return value of update_open_stateid()
2019-08-04 22:35:40 -04:00
nfs4renewd.c
NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.
2018-12-19 13:52:46 -05:00
nfs4session.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
nfs4session.h
NFSv4.1: Bump the default callback session slot count to 16
2019-03-02 16:25:26 -05:00
nfs4state.c
NFSv4: Fix a potential sleep while atomic in nfs4_do_reclaim()
2019-08-04 22:35:40 -04:00
nfs4super.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
nfs4sysctl.c
nfs: Do not convert nfs_idmap_cache_timeout to jiffies
2018-01-18 15:10:47 -05:00
nfs4trace.c
pnfs/flexfiles: Add tracepoints for detecting pnfs fallback to MDS
2019-07-18 15:50:28 -04:00
nfs4trace.h
pnfs/flexfiles: Add tracepoints for detecting pnfs fallback to MDS
2019-07-18 15:50:28 -04:00
nfs4xdr.c
nfs4: Make nfs4_proc_get_lease_time available for nfs4.0
2019-07-13 11:48:41 -04:00
nfs42.h
NFSv4.2: Add client support for the generic 'layouterror' RPC call
2019-03-01 16:20:16 -05:00
nfs42proc.c
NFSv4.1 fix incorrect return value in copy_file_range
2019-04-11 15:23:48 -04:00
nfs42xdr.c
NFSv4.2: Add client support for the generic 'layouterror' RPC call
2019-03-01 16:20:16 -05:00
nfs.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nfsroot.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nfstrace.c
NFS: Add trace events to report non-zero NFS status codes
2019-02-13 12:03:21 -05:00
nfstrace.h
NFS: Record task, client ID, and XID in xdr_status trace points
2019-07-09 10:30:25 -04:00
pagelist.c
NFS: Clean up writeback code
2019-07-06 14:54:52 -04:00
pnfs_dev.c
NFS/flexfiles: Speed up read failover when DSes are down
2019-03-01 22:37:38 -05:00
pnfs_nfs.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
pnfs.c
NFSv4: Report the error from nfs4_select_rw_stateid()
2019-08-04 22:35:40 -04:00
pnfs.h
NFS: Add a helper to return a pointer to the open context of a struct nfs_page
2019-04-25 14:18:15 -04:00
proc.c
NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.
2018-12-19 13:52:46 -05:00
read.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
super.c
Merge branch 'work.dcache2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-20 09:15:51 -07:00
symlink.c
nfs: pass the correct prototype to read_cache_page
2019-05-09 16:26:57 -04:00
sysctl.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sysfs.c
NFS: Add sysfs support for per-container identifier
2019-07-06 14:54:49 -04:00
sysfs.h
NFS: Add sysfs support for per-container identifier
2019-07-06 14:54:49 -04:00
unlink.c
fsnotify: move fsnotify_nameremove() hook out of d_delete()
2019-06-20 14:47:44 +02:00
write.c
NFS: Clean up writeback code
2019-07-06 14:54:52 -04:00