21.10 sometimes ignoring USB memory sticks - and a possible workaround.

[Ralf Mardorf]

On Fri, 2021-10-22 at 13:30 +0100, Ian Bruntlett wrote:
> [  141.841437] sd 5:0:0:0: [sdb] Attached SCSI removable disk
> [  963.815395] perf: interrupt took too long (2503 > 2500), lowering kernel.perf_event_max_sample_rate to 79750
> [snip]
> [ 1264.882016] sd 5:0:0:0: [sdb] Attached SCSI removable disk
> [ 1284.796101] perf: interrupt took too long (3146 > 3128), lowering kernel.perf_event_max_sample_rate to 63500

Hi,

"What does interrupt took too long mean
[snip]
Meaning

This essentially means that the machine was stuck on an interrupt for a
long amount of time. [snip]
DISK IO interrupt taking long would be caused by a faulty, slow or
overloaded disk. Alternatively this can be caused by an issue with a
disk or raid controller.
[snip]"
- https://discuss.aerospike.com/t/what-does-interrupt-took-too-long-mean/5818

consider to test another USB stick, probably the USB stick's controller is damaged.

Regards,
Ralf