diff options
| author | Maciej W. Rozycki <macro@orcam.me.uk> | 2026-03-29 15:32:25 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-31 04:11:37 +0300 |
| commit | 7fae6616704a17c64438ad4b73a6effa6c03ffda (patch) | |
| tree | 00bc2a423d54a9167e5ed3c1fb7a90d3a47a2777 | |
| parent | f4ef5b1c13316fa518b7a41e6bff82c33239823c (diff) | |
| download | linux-7fae6616704a17c64438ad4b73a6effa6c03ffda.tar.xz | |
FDDI: defxx: Rate-limit memory allocation errors
Prevent the system from becoming unstable or unusable due to a flood of
memory allocation error messages under memory pressure, e.g.:
[...]
fddi0: Could not allocate receive buffer. Dropping packet.
fddi0: Could not allocate receive buffer. Dropping packet.
fddi0: Could not allocate receive buffer. Dropping packet.
fddi0: Could not allocate receive buffer. Dropping packet.
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 0-...!: (332 ticks this GP) idle=255c/1/0x40000000 softirq=16420123/16420123 fqs=0
rcu: (t=2103 jiffies g=35680089 q=4 ncpus=1)
rcu: rcu_sched kthread timer wakeup didn't happen for 2102 jiffies! g35680089 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=12779658
rcu: rcu_sched kthread starved for 2103 jiffies! g35680089 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_sched state:I stack:0 pid:14 tgid:14 ppid:2 flags:0x00004000
Call Trace:
__schedule+0x258/0x580
schedule+0x19/0xa0
schedule_timeout+0x4a/0xb0
? hrtimers_cpu_dying+0x1b0/0x1b0
rcu_gp_fqs_loop+0xb1/0x450
rcu_gp_kthread+0x9d/0x130
kthread+0xb2/0xe0
? rcu_gp_init+0x4a0/0x4a0
? kthread_park+0x90/0x90
ret_from_fork+0x2d/0x50
? kthread_park+0x90/0x90
ret_from_fork_asm+0x12/0x20
entry_INT80_32+0x10d/0x10d
CPU: 0 UID: 500 PID: 21895 Comm: 31370.exe Not tainted 6.13.0-dirty #2
(here running the libstdc++-v3 testsuite).
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/alpine.DEB.2.21.2603291236590.60268@angie.orcam.me.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/fddi/defxx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/fddi/defxx.c b/drivers/net/fddi/defxx.c index 0fbbb7286008..6b8cfbee3b9d 100644 --- a/drivers/net/fddi/defxx.c +++ b/drivers/net/fddi/defxx.c @@ -3182,7 +3182,7 @@ static void dfx_rcv_queue_process( pkt_len + 3); if (skb == NULL) { - printk("%s: Could not allocate receive buffer. Dropping packet.\n", bp->dev->name); + printk_ratelimited("%s: Could not allocate receive buffer. Dropping packet.\n", bp->dev->name); bp->rcv_discards++; break; } |