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authorTrond Myklebust <trond.myklebust@hammerspace.com>2018-09-08 22:09:48 -0400
committerTrond Myklebust <trond.myklebust@hammerspace.com>2018-09-30 15:35:16 -0400
commitf42f7c283078ce3c1e8368b140e270755b1ae313 (patch)
treee353840e3aca08d191b7280bf91487614fe130c3 /include/linux
parent95f7691daa57bbd68caac2bdad79e0b08f4d46c1 (diff)
SUNRPC: Fix priority queue fairness
Fix up the priority queue to not batch by owner, but by queue, so that we allow '1 << priority' elements to be dequeued before switching to the next priority queue. The owner field is still used to wake up requests in round robin order by owner to avoid single processes hogging the RPC layer by loading the queues. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/sunrpc/sched.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index 8840a420cf4c..7b540c066594 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -189,7 +189,6 @@ struct rpc_timer {
struct rpc_wait_queue {
spinlock_t lock;
struct list_head tasks[RPC_NR_PRIORITY]; /* task queue for each priority level */
- pid_t owner; /* process id of last task serviced */
unsigned char maxpriority; /* maximum priority (0 if queue is not a priority queue) */
unsigned char priority; /* current priority */
unsigned char nr; /* # tasks remaining for cookie */
@@ -205,7 +204,6 @@ struct rpc_wait_queue {
* from a single cookie. The aim is to improve
* performance of NFS operations such as read/write.
*/
-#define RPC_BATCH_COUNT 16
#define RPC_IS_PRIORITY(q) ((q)->maxpriority > 0)
/*