diff options
| author | Jeff Layton <jlayton@kernel.org> | 2026-01-06 13:59:48 -0500 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2026-01-28 10:15:42 -0500 |
| commit | a0022a38be1017fb302563eaee54ff904be48cea (patch) | |
| tree | f5b991fb1f10a501d3b64be128e9e65d7711b27d /include/linux | |
| parent | 7f221b340d16558919d963a2afed585d6a145fa4 (diff) | |
sunrpc: allow svc_recv() to return -ETIMEDOUT and -EBUSY
To dynamically adjust the thread count, nfsd requires some information
about how busy things are.
Change svc_recv() to take a timeout value, and then allow the wait for
work to time out if it's set. If a timeout is not defined, then the
schedule will be set to MAX_SCHEDULE_TIMEOUT. If the task waits for the
full timeout, then have it return -ETIMEDOUT to the caller.
If it wakes up, finds that there is more work and that no threads are
available, then attempt to set SP_TASK_STARTING. If wasn't already set,
have the task return -EBUSY to cue to the caller that the service could
use more threads.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/sunrpc/svc.h | 1 | ||||
| -rw-r--r-- | include/linux/sunrpc/svcsock.h | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index b55ed8404a9e..4dc14c7a711b 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -55,6 +55,7 @@ enum { SP_TASK_PENDING, /* still work to do even if no xprt is queued */ SP_NEED_VICTIM, /* One thread needs to agree to exit */ SP_VICTIM_REMAINS, /* One thread needs to actually exit */ + SP_TASK_STARTING, /* Task has started but not added to idle yet */ }; diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h index de37069aba90..372a00882ca6 100644 --- a/include/linux/sunrpc/svcsock.h +++ b/include/linux/sunrpc/svcsock.h @@ -61,7 +61,7 @@ static inline u32 svc_sock_final_rec(struct svc_sock *svsk) /* * Function prototypes. */ -void svc_recv(struct svc_rqst *rqstp); +int svc_recv(struct svc_rqst *rqstp, long timeo); void svc_send(struct svc_rqst *rqstp); int svc_addsock(struct svc_serv *serv, struct net *net, const int fd, char *name_return, const size_t len, |