On Fri, Dec 10, 2021 at 9:25 AM Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx> wrote: > > On 10/12/2021 11:16, Alex Deucher wrote:> [...] > > Why not just reload the driver after kexec? > > > > Alex > > Because the original issue is the kdump case, and we want a very very > tiny kernel - also, the crash originally could have been caused by > amdgpu itself, so if it's a GPU issue, we don't want to mess with that > in kdump. And I confess I tried modprobe amdgpu after a kdump, no > success - kdump won't call shutdown handlers, so GPU will be in a > "rogue" state... > > My question was about regular kexec because it's much simpler usually, > we can do whatever we want there. My line of thought was: if I make it > work in regular kexec with a simple framebuffer, I might be able to get > it working on kdump heheh > Well if the GPU is hung, I'm not sure if you'll be able to get back the display environment without a GPU reset and once you do that, you've lost any state you might have been trying to preserve. Alex
