[Intel-wired-lan] [PATCH iwl-net v1 1/5] igc: Ensure the PTM cycle is reliably triggered

[Corinna Vinschen]

Hi Christopher,

On Aug  6 17:30, christopher.s.hall at intel.com wrote:
> From: Christopher S M Hall <christopher.s.hall at intel.com>
> 
> Writing to clear the PTM status 'valid' bit while the PTM cycle is
> triggered results in unreliable PTM operation. To fix this, clear the
> PTM 'trigger' and status after each PTM transaction.
> 
> The issue can be reproduced with the following:
> 
> $ sudo phc2sys -R 1000 -O 0 -i tsn0 -m
> 
> Note: 1000 Hz (-R 1000) is unrealistically large, but provides a way to
> quickly reproduce the issue.
> 
> PHC2SYS exits with:
> 
> "ioctl PTP_OFFSET_PRECISE: Connection timed out" when the PTM transaction
>   fails

It would be great to add the problems encountered with kdump to the
commit message as well, as discussed with Vinicius, wouldn't it?

If you need a description, I can provide one.


Thanks,
Corinna