linux/fs/nfsd
Dai Ngo 4271c2c088 NFSD: limit the number of v4 clients to 1024 per 1GB of system memory
Currently there is no limit on how many v4 clients are supported
by the system. This can be a problem in systems with small memory
configuration to function properly when a very large number of
clients exist that creates memory shortage conditions.

This patch enforces a limit of 1024 NFSv4 clients, including courtesy
clients, per 1GB of system memory.  When the number of the clients
reaches the limit, requests that create new clients are returned
with NFS4ERR_DELAY and the laundromat is kicked start to trim old
clients. Due to the overhead of the upcall to remove the client
record, the maximun number of clients the laundromat removes on
each run is limited to 128. This is done to ensure the laundromat
can still process the other tasks in a timely manner.

Since there is now a limit of the number of clients, the 24-hr
idle time limit of courtesy client is no longer needed and was
removed.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2022-07-29 20:16:56 -04:00
..
acl.h
auth.c
auth.h
blocklayout.c block: remove genhd.h 2022-02-02 07:49:59 -07:00
blocklayoutxdr.c
blocklayoutxdr.h
cache.h
current_stateid.h
export.c fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
export.h
fault_inject.c
filecache.c NFSD: Ensure nf_inode is never dereferenced 2022-07-29 20:16:56 -04:00
filecache.h NFSD: Ensure nf_inode is never dereferenced 2022-07-29 20:16:56 -04:00
flexfilelayout.c nfsd: use correct format characters 2022-03-17 19:47:38 -04:00
flexfilelayoutxdr.c
flexfilelayoutxdr.h
idmap.h
Kconfig NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
lockd.c NFSD: simplify struct nfsfh 2021-10-02 15:51:10 -04:00
Makefile NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
netns.h NFSD: limit the number of v4 clients to 1024 per 1GB of system memory 2022-07-29 20:16:56 -04:00
nfs2acl.c SUNRPC: Return true/false (not 1/0) from bool functions 2022-03-27 23:25:52 -04:00
nfs3acl.c SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
nfs3proc.c NFSD: Refactor NFSv3 CREATE 2022-05-20 13:18:24 -04:00
nfs3xdr.c NFSD: Deprecate NFS_OFFSET_MAX 2022-02-09 09:24:40 -05:00
nfs4acl.c
nfs4callback.c NFSD: simplify struct nfsfh 2021-10-02 15:51:10 -04:00
nfs4idmap.c
nfs4layouts.c nfsd: fix using the correct variable for sizeof() 2022-03-20 12:49:38 -04:00
nfs4proc.c NFSD: Demote a WARN to a pr_warn() 2022-07-29 20:09:21 -04:00
nfs4recover.c nfsd: Fix nsfd startup race (again) 2021-12-10 11:54:59 -05:00
nfs4state.c NFSD: limit the number of v4 clients to 1024 per 1GB of system memory 2022-07-29 20:16:56 -04:00
nfs4xdr.c NFSD: Decode NFSv4 birth time attribute 2022-07-11 13:52:22 -04:00
nfscache.c nfsd: destroy percpu stats counters after reply cache shutdown 2022-05-23 15:22:17 -04:00
nfsctl.c NFSD: refactoring v4 specific code to a helper in nfs4state.c 2022-07-29 20:16:56 -04:00
nfsd.h NFSD: limit the number of v4 clients to 1024 per 1GB of system memory 2022-07-29 20:16:56 -04:00
nfsfh.c NFSD: Instrument fh_verify() 2022-07-29 20:08:56 -04:00
nfsfh.h NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
nfsproc.c NFSD: prevent underflow in nfssvc_decode_writeargs() 2022-03-15 09:35:56 -04:00
nfssvc.c NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
nfsxdr.c SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
pnfs.h
state.h NFSD: add courteous server support for thread with only delegation 2022-05-19 12:25:39 -04:00
stats.c nfsd: make nfsd_stats.th_cnt atomic_t 2021-12-13 13:42:51 -05:00
stats.h nfsd: make nfsd_stats.th_cnt atomic_t 2021-12-13 13:42:51 -05:00
trace.c
trace.h NFSD: Move nfsd_file_trace_alloc() tracepoint 2022-07-29 20:16:07 -04:00
vfs.c Notable regression fixes: 2022-07-02 11:20:56 -07:00
vfs.h NFSD: Clean up nfsd_open_verified() 2022-05-20 13:18:25 -04:00
xdr3.h SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
xdr4.h NFSD: Instantiate a struct file when creating a regular NFSv4 file 2022-05-23 11:06:29 -04:00
xdr4cb.h
xdr.h NFSD: prevent underflow in nfssvc_decode_writeargs() 2022-03-15 09:35:56 -04:00