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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-09 05:09:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-25 17:54:28 +0300 |
| commit | 20cebfcc831224655050a9a1fe837997067e7179 (patch) | |
| tree | ca313ed32c2ca36aa1d75bdf322ff9f18fdc8aac /include | |
| parent | 8669a2782c055ac090fe51b672f669b73685b716 (diff) | |
| download | linux-20cebfcc831224655050a9a1fe837997067e7179.tar.xz | |
SUNRPC: Fix priority queue fairness
[ Upstream commit f42f7c283078ce3c1e8368b140e270755b1ae313 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sunrpc/sched.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h index d703f0ef37d8..7d347e8cf944 100644 --- a/include/linux/sunrpc/sched.h +++ b/include/linux/sunrpc/sched.h @@ -181,7 +181,6 @@ 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 */ @@ -197,7 +196,6 @@ 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) /* |