On 7/14/22 10:56 AM, dai.ngo@xxxxxxxxxx wrote:
On 7/14/22 10:18 AM, Chuck Lever III wrote:
On Jul 14, 2022, at 12:17 PM, Dai Ngo <dai.ngo@xxxxxxxxxx> wrote:
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.
Hello Dai, I applied these two to NFSD's for-next branch for early
adopters and other testing and review.
Thank you Chuck,
I forgot to mention that I will prepare the patches for
pynfs to deal with NFS4ERR_DELAY on SETCLIENIID and
EXCHANGE_ID.
-Dai
-Dai
---
Dai Ngo (2):
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 | 28 ++++++++++++++++++++--------
fs/nfsd/nfsctl.c | 8 ++++++++
fs/nfsd/nfsd.h | 2 ++
4 files changed, 33 insertions(+), 8 deletions(-)
--
Dai Ngo
--
Chuck Lever
