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SUNRPC: Add a server side per-connection limit

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Allow the user to limit the number of requests serviced through a single
connection, to help prevent faster clients from starving slower clients.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2016-06-24 10:55:50 -04:00 • committed by J. Bruce Fields
parent 4720b0703a
commit ff3ac5c3dc
4 changed files with 44 additions and 3 deletions
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1
include/linux/sunrpc/svc.h
View file

@ -268,6 +268,7 @@ struct svc_rqst {
* cache pages */
#define RQ_VICTIM (5) /* about to be shut down */
#define RQ_BUSY (6) /* request is busy */
#define RQ_DATA (7) /* request has data */
unsigned long rq_flags; /* flags field */
void * rq_argp; /* decoded arguments */

1
include/linux/sunrpc/svc_xprt.h
View file

@ -69,6 +69,7 @@ struct svc_xprt {
struct svc_serv *xpt_server; /* service for transport */
atomic_t xpt_reserved; /* space on outq that is rsvd */
atomic_t xpt_nr_rqsts; /* Number of requests */
struct mutex xpt_mutex; /* to serialize sending data */
spinlock_t xpt_lock; /* protects sk_deferred
* and xpt_auth_cache */