Dai Ngo 4b676584d0 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 12:59:48 +02:00
..
acpi	ACPI: APEI: explicit init of HEST and GHES in apci_init()	2023-09-19 12:20:28 +02:00
asm-generic	asm-generic: qspinlock: fix queued_spin_value_unlocked() implementation	2023-12-20 15:44:35 +01:00
clocksource	…
crypto	crypto: af_alg - Disallow multiple in-flight AIO requests	2024-01-25 14:37:42 -08:00
drm	drm: Don't treat 0 as -1 in drm_fixp2int_ceil	2024-03-26 18:21:54 -04:00
dt-bindings	dt-bindings: clock: Update the videocc resets for sm8150	2024-01-25 14:37:48 -08:00
keys	…
kunit	…
kvm	…
linux	SUNRPC: increase size of rpc_wait_queue.qlen from unsigned short to unsigned int	2024-04-13 12:59:48 +02:00
math-emu	…
media	media: v4l2-mem2mem: add lock to protect parameter num_rdy	2023-08-26 15:26:44 +02:00
memory	…
misc	…
net	tcp: properly terminate timers for kernel sockets	2024-04-13 12:59:15 +02:00
pcmcia	…
ras	…
rdma	RDMA/cma: Always set static rate to 0 for RoCE	2023-06-21 15:45:39 +02:00
scsi	scsi: core: Introduce enum scsi_disposition	2024-02-23 08:42:15 +01:00
soc	soc: fsl: qbman: Add CGR update function	2024-04-13 12:58:36 +02:00
sound	ASoC: soc-card: Add storage for PCI SSID	2023-11-28 16:54:51 +00:00
target	scsi: target: Fix multiple LUN_RESET handling	2023-05-17 11:47:48 +02:00
trace	tracing/net_sched: Fix tracepoints that save qdisc_dev() as a string	2024-03-15 10:48:14 -04:00
uapi	scsi: fc: Update formal FPIN descriptor definitions	2024-03-26 18:22:03 -04:00
vdso	…
video	…
xen	ACPI: processor: Fix evaluating _PDC method when running as Xen dom0	2023-05-17 11:47:42 +02:00