NeilBrown 0588b8a034 NFS: switch nfsiod to be an UNBOUND workqueue. ... [ Upstream commit bf701b765e ] nfsiod is currently a concurrency-managed workqueue (CMWQ). This means that workitems scheduled to nfsiod on a given CPU are queued behind all other work items queued on any CMWQ on the same CPU. This can introduce unexpected latency. Occaionally nfsiod can even cause excessive latency. If the work item to complete a CLOSE request calls the final iput() on an inode, the address_space of that inode will be dismantled. This takes time proportional to the number of in-memory pages, which on a large host working on large files (e.g.. 5TB), can be a large number of pages resulting in a noticable number of seconds. We can avoid these latency problems by switching nfsiod to WQ_UNBOUND. This causes each concurrent work item to gets a dedicated thread which can be scheduled to an idle CPU. There is precedent for this as several other filesystems use WQ_UNBOUND workqueue for handling various async events. Signed-off-by: NeilBrown <neilb@suse.de> Fixes: ada609ee2a ("workqueue: use WQ_MEM_RECLAIM instead of WQ_RESCUER") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-12-30 11:51:16 +01:00
..
blocklayout	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
filelayout	pNFS/filelayout: enable LAYOUTGET on OPEN	2019-09-24 16:28:38 -04:00
flexfilelayout	pNFS/flexfiles: Fix list corruption if the mirror count changes	2020-06-30 15:37:12 -04:00
Kconfig	nfs: NFS_SWAP should depend on SWAP	2020-02-14 16:34:10 -05:00
Makefile	NFS: Create a root NFS directory in /sys/fs/nfs	2019-07-06 14:54:49 -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.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
callback_proc.c	NFSv4/pnfs: Return valid stateids in nfs_layout_find_inode_by_stateid()	2020-04-23 10:36:31 +02:00
callback_xdr.c	SUNRPC/nfs: Fix return value for nfs4_callback_compound()	2019-04-24 09:46:34 -04:00
client.c	nfs: add minor version to nfs_server_key for fscache	2020-04-01 11:01:50 +02:00
delegation.c	NFS: Fix an RCU lock leak in nfs4_refresh_delegation_stateid()	2019-11-01 11:03:56 -04:00
delegation.h	NFSv4: Don't allow a cached open with a revoked delegation	2019-11-01 10:59:26 -04:00
dir.c	nfs: Fix security label length not being reset	2020-10-07 08:01:28 +02:00
direct.c	SUNRPC reverting d03727b248 ("NFSv4 fix CLOSE not waiting for direct IO compeletion")	2020-07-29 10:18:29 +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	nfs: nfs_file_write() should check for writeback errors	2020-08-21 13:05:36 +02:00
fscache-index.c	nfs: fscache: use timespec64 in inode auxdata	2020-05-20 08:20:23 +02:00
fscache.c	NFSv4: Fix fscache cookie aux_data to ensure change_attr is included	2020-05-20 08:20:23 +02:00
fscache.h	nfs: fscache: use timespec64 in inode auxdata	2020-05-20 08:20:23 +02:00
getroot.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
inode.c	NFS: switch nfsiod to be an UNBOUND workqueue.	2020-12-30 11:51:16 +01:00
internal.h	NFS Client Updates for Linux 5.3	2019-09-26 12:20:14 -07:00
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
mount_clnt.c	NFSv3: fix rpc receive buffer size for MOUNT call	2020-05-20 08:20:27 +02:00
namespace.c	NFS: fix nfs_path in case of a rename retry	2020-11-05 11:43:24 +01:00
netns.h	NFS: Add sysfs support for per-container identifier	2019-07-06 14:54:49 -04:00
nfs.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nfs2super.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
nfs2xdr.c	NFSv2: Fix a typo in encode_sattr()	2020-01-17 19:48:47 +01:00
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 potential posix_acl refcnt leak in nfs3_set_acl	2020-05-06 08:15:16 +02:00
nfs3client.c	pNFS: Allow multiple connections to the DS	2019-07-06 14:54:50 -04:00
nfs3proc.c	NFSv3: use nfs_add_or_obtain() to create and reference inodes	2019-09-20 15:15:24 -04:00
nfs3super.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
nfs3xdr.c	NFS/pnfs: Fix pnfs_generic_prepare_to_resend_writes()	2020-02-14 16:34:10 -05:00
nfs4_fs.h	NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE	2020-11-05 11:43:31 +01:00
nfs4client.c	nfs: add minor version to nfs_server_key for fscache	2020-04-01 11:01:50 +02:00
nfs4file.c	NFS4: Fix oops when copy_file_range is attempted with NFS4.0 source	2020-11-05 11:43:14 +01:00
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	NFSv4.2: condition READDIR's mask for security label based on LSM state	2020-12-30 11:51:16 +01:00
nfs4renewd.c	NFSv4.0: nfs4_do_fsinfo() should not do implicit lease renewals	2020-02-14 16:34:11 -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	nfs: fix NULL deference in nfs4_get_valid_delegation	2020-05-20 08:20:24 +02:00
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	NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE	2020-11-05 11:43:31 +01:00
nfs4xdr.c	NFSv4: Fix the alignment of page data in the getdeviceinfo reply	2020-12-30 11:51:16 +01:00
nfs42.h	NFSv4.2: Add client support for the generic 'layouterror' RPC call	2019-03-01 16:20:16 -05:00
nfs42proc.c	NFS: Fix memory leaks	2020-02-24 08:37:02 +01:00
nfs42xdr.c	NFSv4.2: Add client support for the generic 'layouterror' RPC call	2019-03-01 16:20:16 -05:00
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: nfs_xdr_status should record the procedure name	2020-10-01 13:18:09 +02:00
pagelist.c	NFS: Fix races nfs_page_group_destroy() vs nfs_destroy_unlinked_subrequests()	2020-10-01 13:17:52 +02:00
pnfs.c	NFS: Don't return layout segments that are in use	2020-08-19 08:16:25 +02:00
pnfs.h	pNFS: Handle NFS4ERR_OLD_STATEID on layoutreturn by bumping the state seqid	2019-09-20 15:48:35 -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	NFS/pnfs: Fix pnfs_generic_prepare_to_resend_writes()	2020-02-14 16:34:10 -05:00
proc.c	NFSv2: Fix write regression	2019-08-27 10:24:56 -04:00
read.c	NFS: Fix spurious EIO read errors	2019-08-26 15:31:29 -04:00
super.c	NFS Client Updates for Linux 5.3	2019-09-26 12:20:14 -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: Fix races nfs_page_group_destroy() vs nfs_destroy_unlinked_subrequests()	2020-10-01 13:17:52 +02:00