Re: Network very very slow... was iSCSI and jumbo frames

[Michael van Elst <mlelstv%serpens.de@localhost>]

On Mon, Feb 08, 2021 at 11:45:52AM +0100, BERTRAND Joël wrote:

> Some timestamps between lines seem strange :

> [ 313044.732208] ISCSI: scsipi_request GROW_RESOURCES
> [ 313044.832245] ISCSI: scsipi_request GROW_RESOURCES
> [ 313044.932283] ISCSI: scsipi_request GROW_RESOURCES
> [ 313045.032320] ISCSI: scsipi_request GROW_RESOURCES
...

Maybe not like you think.

The GROW_RESOURCES request occurs precisely every 100ms. That is
caused by a 100ms delay whenever iscsi fails to "grow resources".
You don't see a message "Grow send window to..." either.

So yes, that's an issue with the initiator that can be fixed.


Greetings,
-- 
                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."