This patch series enforces a limit on the number of v4 clients allowed
in the system. With Courteous server support there are potentially a
lots courtesy clients exist in the system that use up memory resource
preventing them to be used by other components in the system. Also
without a limit on the number of clients, the number of clients can
grow to a very large number even for system with small memory configuration
eventually render the system into an unusable state.
v2:
. move all defines to nfsd.h
. replace unsigned int nfs4_max_client to int
. kick start laundromat in alloc_client when max client reached.
. restyle compute of maxreap in nfs4_get_client_reaplist to oneline.
. redo enforce of maxreap in nfs4_get_client_reaplist for readability
. use bit-wise interger to compute usable memory in nfsd_init_net.
. replace NFS4_MAX_CLIENTS_PER_4GB to NFS4_CLIENTS_PER_GB.
. use all memory, including high mem, to compute max client.
v3:
. refactoring v4 initialization specific code to a helper in nfs4state.c
. fix kernel test robot issue with NFS4_CLIENTS_PER_GB when
CONFIG_NFSD_V4 is not defined by moving v4 specific code
to helper nfsd4_init_leases_net in nfs4state.c
---
Dai Ngo (2):
NFSD: refactoring v4 specific code to a helper in nfs4state.c
NFSD: keep track of the number of v4 clients in the system
NFSD: limit the number of v4 clients to 1024 per 1GB of system memory
fs/nfsd/netns.h | 3 +++
fs/nfsd/nfs4state.c | 49 ++++++++++++++++++++++++++++++++++++++++--------
fs/nfsd/nfsctl.c | 9 +--------
fs/nfsd/nfsd.h | 6 ++++++
4 files changed, 51 insertions(+), 16 deletions(-)
--
Dai Ngo
