From: Timur Tabi <ti...@codeaurora.org> Date: Wed, 2 Aug 2017 13:23:18 -0500
> On 08/02/2017 12:54 PM, David Miller wrote: >> And if this kind of thing matters to the user, they will have a >> software or hardware watchdog driver enabled to break out of this >> situation. > > The problem is that the user is not going to expect that the EMAC can > disable the nearby switch(es) when the kernel is hung and not rebooted > quickly enough. Internally, this bug/feature has caused quite a bit > of mayhem, so the problem is real. No cares about enabling flow > control -- it just happens to be enabled on some systems where the > switch agrees to it. So random individuals can't debug the hardware > because suddenly the EMAC has gone haywire and disabled the local > network. Again, any serious installation will have a system watchdog enabled which will break the pause frame bomb.
