Dai Ngo 43be051f35 SUNRPC: increase size of rpc_wait_queue.qlen from unsigned short to unsigned int ... [ Upstream commit 2c35f43b5a ] When the NFS client is under extreme load the rpc_wait_queue.qlen counter can be overflowed. Here is an instant of the backlog queue overflow in a real world environment shown by drgn helper: rpc_task_stats(rpc_clnt): ------------------------- rpc_clnt: 0xffff92b65d2bae00 rpc_xprt: 0xffff9275db64f000 Queue: sending[64887] pending[524] backlog[30441] binding[0] XMIT task: 0xffff925c6b1d8e98 WRITE: 750654 __dta_call_status_580: 65463 __dta_call_transmit_status_579: 1 call_reserveresult: 685189 nfs_client_init_is_complete: 1 COMMIT: 584 call_reserveresult: 573 __dta_call_status_580: 11 ACCESS: 1 __dta_call_status_580: 1 GETATTR: 10 __dta_call_status_580: 4 call_reserveresult: 6 751249 tasks for server 111.222.333.444 Total tasks: 751249 count_rpc_wait_queues(xprt): ---------------------------- **** rpc_xprt: 0xffff9275db64f000 num_reqs: 65511 wait_queue: xprt_binding[0] cnt: 0 wait_queue: xprt_binding[1] cnt: 0 wait_queue: xprt_binding[2] cnt: 0 wait_queue: xprt_binding[3] cnt: 0 rpc_wait_queue[xprt_binding].qlen: 0 maxpriority: 0 wait_queue: xprt_sending[0] cnt: 0 wait_queue: xprt_sending[1] cnt: 64887 wait_queue: xprt_sending[2] cnt: 0 wait_queue: xprt_sending[3] cnt: 0 rpc_wait_queue[xprt_sending].qlen: 64887 maxpriority: 3 wait_queue: xprt_pending[0] cnt: 524 wait_queue: xprt_pending[1] cnt: 0 wait_queue: xprt_pending[2] cnt: 0 wait_queue: xprt_pending[3] cnt: 0 rpc_wait_queue[xprt_pending].qlen: 524 maxpriority: 0 wait_queue: xprt_backlog[0] cnt: 0 wait_queue: xprt_backlog[1] cnt: 685801 wait_queue: xprt_backlog[2] cnt: 0 wait_queue: xprt_backlog[3] cnt: 0 rpc_wait_queue[xprt_backlog].qlen: 30441 maxpriority: 3 [task cnt mismatch] There is no effect on operations when this overflow occurs. However it causes confusion when trying to diagnose the performance problem. Signed-off-by: Dai Ngo <dai.ngo@oracle.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-04-13 13:05:11 +02:00
..
acpi
asm-generic	linux/init: remove __memexit* annotations	2024-02-23 09:12:38 +01:00
clocksource
crypto	crypto: af_alg - Disallow multiple in-flight AIO requests	2024-01-25 15:27:21 -08:00
drm	drm/probe-helper: warn about negative .get_modes()	2024-04-03 15:19:36 +02:00
dt-bindings	clk: renesas: r8a779g0: Correct PFC/GPIO parent clocks	2024-03-26 18:20:48 -04:00
keys
kunit
kvm	KVM: arm64: Fix host-programmed guest events in nVHE	2024-04-10 16:28:23 +02:00
linux	SUNRPC: increase size of rpc_wait_queue.qlen from unsigned short to unsigned int	2024-04-13 13:05:11 +02:00
math-emu
media	media: mc: Add num_links flag to media_pad	2024-04-03 15:19:25 +02:00
memory
misc
net	Bluetooth: add quirk for broken address properties	2024-04-10 16:28:24 +02:00
pcmcia
ras
rdma
rv
scsi	scsi: sd: Fix TCG OPAL unlock on system resume	2024-04-03 15:19:51 +02:00
soc
sound
target
trace	tracing/net_sched: Fix tracepoints that save qdisc_dev() as a string	2024-03-15 10:48:14 -04:00
uapi	RDMA/irdma: Allow accurate reporting on QP max send/recv WR	2024-03-26 18:20:53 -04:00
ufs
vdso
video
xen