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| author | Jeff Layton <jlayton@poochiereds.net> | 2015-06-03 16:14:26 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-06-10 18:26:18 -0400 |
| commit | 8e2281330f9930bccf77cf04027ec60b6cc0fb34 (patch) | |
| tree | 6047f570e0ec5de10303d29326d6f62f5d0e2065 /include/linux/sunrpc/xprt.h | |
| parent | 3c87ef6efb40f0e339d705c194b2224f854ec38e (diff) | |
| download | linux-8e2281330f9930bccf77cf04027ec60b6cc0fb34.tar.gz linux-8e2281330f9930bccf77cf04027ec60b6cc0fb34.tar.bz2 linux-8e2281330f9930bccf77cf04027ec60b6cc0fb34.zip | |
sunrpc: make xprt->swapper an atomic_t
Split xs_swapper into enable/disable functions and eliminate the
"enable" flag.
Currently, it's racy if you have multiple swapon/swapoff operations
running in parallel over the same xprt. Also fix it so that we only
set it to a memalloc socket on a 0->1 transition and only clear it
on a 1->0 transition.
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/sunrpc/xprt.h')
| -rw-r--r-- | include/linux/sunrpc/xprt.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index bc9c39d6d30d..9a3308703c15 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -180,7 +180,7 @@ struct rpc_xprt { atomic_t num_reqs; /* total slots */ unsigned long state; /* transport state */ unsigned char resvport : 1; /* use a reserved port */ - unsigned int swapper; /* we're swapping over this + atomic_t swapper; /* we're swapping over this transport */ unsigned int bind_index; /* bind function index */ @@ -346,7 +346,8 @@ void xprt_release_rqst_cong(struct rpc_task *task); void xprt_disconnect_done(struct rpc_xprt *xprt); void xprt_force_disconnect(struct rpc_xprt *xprt); void xprt_conditional_disconnect(struct rpc_xprt *xprt, unsigned int cookie); -int xs_swapper(struct rpc_xprt *xprt, int enable); +int xs_swapper_enable(struct rpc_xprt *xprt); +void xs_swapper_disable(struct rpc_xprt *xprt); bool xprt_lock_connect(struct rpc_xprt *, struct rpc_task *, void *); void xprt_unlock_connect(struct rpc_xprt *, void *); |