NeilBrown bf701b765e NFS: switch nfsiod to be an UNBOUND workqueue. ... 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>		2020-12-02 14:05:54 -05:00
..
blocklayout	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
filelayout	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
flexfilelayout	pNFS/flexfiles: Fix up layoutstats reporting for non-TCP transports	2020-12-02 14:05:53 -05:00
cache_lib.c
cache_lib.h
callback_proc.c	NFSv4: Add support for CB_RECALL_ANY for flexfiles layouts	2020-03-16 08:34:30 -04:00
callback_xdr.c	NFS4: Report callback authentication errors	2020-01-15 10:54:31 -05:00
callback.c	SUNRPC: Cache the process user cred in the RPC server listener	2019-04-24 09:46:35 -04:00
callback.h	NFSv4: Add support for CB_RECALL_ANY for flexfiles layouts	2020-03-16 08:34:30 -04:00
client.c	NFS: NFSv2/NFSv3: Use cred from fs_context during mount	2020-12-02 14:05:54 -05:00
delegation.c	NFS: Beware when dereferencing the delegation cred	2020-04-03 18:26:02 -04:00
delegation.h	NFSv4: Ensure the delegation is pinned in nfs_do_return_delegation()	2020-02-13 16:18:50 -05:00
dir.c	NFS: Do uncached readdir when we're seeking a cookie in an empty page cache	2020-12-02 14:05:52 -05:00
direct.c	NFS client updates for Linux 5.9	2020-08-15 08:26:55 -07:00
dns_resolve.c	NFS: remove duplicate headers	2020-05-27 10:10:12 -04:00
dns_resolve.h
export.c	NFS: Add a tracepoint in nfs_fh_to_dentry()	2019-11-03 21:28:46 -05:00
file.c	NFS client updates for Linux 5.9	2020-08-15 08:26:55 -07:00
fs_context.c	NFS: Switch mount code to use xprt_find_transport_ident()	2020-12-02 14:05:53 -05:00
fscache-index.c	nfs: fscache: use timespec64 in inode auxdata	2020-01-15 10:54:30 -05:00
fscache.c	NFSv4: Fix fscache cookie aux_data to ensure change_attr is included	2020-05-08 22:20:24 +01:00
fscache.h	nfs: fscache: use timespec64 in inode auxdata	2020-01-15 10:54:30 -05:00
getroot.c	NFS: Ensure security label is set for root inode	2020-03-30 19:56:50 -04:00
inode.c	NFS: switch nfsiod to be an UNBOUND workqueue.	2020-12-02 14:05:54 -05:00
internal.h	NFS: Support larger readdir buffers	2020-12-02 14:05:52 -05:00
io.c	NFS: Fix up documentation warnings	2019-02-20 15:14:21 -05:00
iostat.h
Kconfig	Documentation: nfsroot.rst: Fix references to nfsroot.rst	2020-03-02 13:11:46 -07:00
Makefile	NFSv4.2: add client side xattr caching.	2020-07-13 17:52:46 -04:00
mount_clnt.c	NFSv3: fix rpc receive buffer size for MOUNT call	2020-05-14 18:42:44 -04:00
namespace.c	NFS: fix nfs_path in case of a rename retry	2020-10-06 10:21:18 -04:00
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	SUNRPC: Clean up the handling of page padding in rpc_prepare_reply_pages()	2020-12-02 14:05:53 -05:00
nfs3_fs.h	NFS: Additional refactoring for fs_context conversion	2020-01-15 10:15:17 -05:00
nfs3acl.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
nfs3client.c	NFS: Additional refactoring for fs_context conversion	2020-01-15 10:15:17 -05:00
nfs3proc.c	NFS: Allow the NFS generic code to pass in a verifier to readdir	2020-12-02 14:05:52 -05:00
nfs3super.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
nfs3xdr.c	SUNRPC: Clean up the handling of page padding in rpc_prepare_reply_pages()	2020-12-02 14:05:53 -05:00
nfs4_fs.h	NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE	2020-10-02 08:43:09 -04:00
nfs4client.c	NFSv4: Refactor to use user namespaces for nfs4idmap	2020-12-02 14:05:54 -05:00
nfs4file.c	NFSv4.2: Fix 5 seconds delay when doing inter server copy	2020-12-02 13:45:33 -05:00
nfs4getroot.c
nfs4idmap.c	NFS: Only reference user namespace from nfs4idmap struct instead of cred	2020-10-13 15:56:54 -04:00
nfs4idmap.h
nfs4namespace.c	nfs: Fix memory leak of export_path	2020-06-26 08:43:14 -04:00
nfs4proc.c	NFS: Handle NFS4ERR_NOT_SAME and NFSERR_BADCOOKIE from readdir calls	2020-12-02 14:05:52 -05:00
nfs4renewd.c	NFSv4.0: nfs4_do_fsinfo() should not do implicit lease renewals	2020-02-04 12:27:55 -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	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
nfs4super.c	NFSv4: Fix a pNFS layout related use-after-free race when freeing the inode	2020-12-02 14:05:54 -05:00
nfs4sysctl.c
nfs4trace.c	pNFS/flexfiles: Add tracing for layout errors	2020-01-15 10:54:33 -05:00
nfs4trace.h	NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE	2020-10-02 08:43:09 -04:00
nfs4xdr.c	NFSv4: Fix open coded xdr_stream_remaining()	2020-12-02 14:05:54 -05:00
nfs42.h	NFSv4.2: add the extended attribute proc functions.	2020-07-13 17:52:45 -04:00
nfs42proc.c	NFS: Fix rpcrdma_inline_fixup() crash with new LISTXATTRS operation	2020-12-02 13:19:20 -05:00
nfs42xattr.c	NFSv4.2: fix failure to unregister shrinker	2020-11-12 10:40:02 -05:00
nfs42xdr.c	NFS: Fix rpcrdma_inline_fixup() crash with new LISTXATTRS operation	2020-12-02 13:19:20 -05:00
nfs.h
nfsroot.c	nfsroot: Default mount option should ask for built-in NFS version	2020-11-02 10:29:03 -05:00
nfstrace.c	NFS: Add trace events to report non-zero NFS status codes	2019-02-13 12:03:21 -05:00
nfstrace.h	nfs: define and use the NFS_INO_INVALID_XATTR flag	2020-07-13 17:52:45 -04:00
pagelist.c	pNFS/flexfiles: Fix array overflow when flexfiles mirroring is enabled	2020-11-30 10:52:22 -05:00
pnfs_dev.c	NFS/flexfiles: Speed up read failover when DSes are down	2019-03-01 22:37:38 -05:00
pnfs_nfs.c	pNFS: Clean up open coded xdr string decoding	2020-12-02 14:05:53 -05:00
pnfs.c	NFSv4: Fix a pNFS layout related use-after-free race when freeing the inode	2020-12-02 14:05:54 -05:00
pnfs.h	NFSv4: Fix a pNFS layout related use-after-free race when freeing the inode	2020-12-02 14:05:54 -05:00
proc.c	NFS: Allow the NFS generic code to pass in a verifier to readdir	2020-12-02 14:05:52 -05:00
read.c	NFS: Trace short NFS READs	2020-06-11 13:33:48 -04:00
super.c	The one new feature this time, from Anna Schumaker, is READ_PLUS, which	2020-10-22 09:44:27 -07:00
symlink.c	nfs: pass the correct prototype to read_cache_page	2019-05-09 16:26:57 -04:00
sysctl.c
sysfs.c	NFSv4: Fix up RCU annotations for struct nfs_netns_client	2020-10-15 13:31:08 -04:00
sysfs.h	NFSv4: Fix up RCU annotations for struct nfs_netns_client	2020-10-15 13:31:08 -04:00
unlink.c	NFS: Avoid referencing the cred twice in async rename/unlink	2020-03-16 08:34:29 -04:00
write.c	mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead	2020-06-02 10:59:08 -07:00