Re: [PATCH v1] mm/gup: remove (VM_)BUG_ONs

[Lorenzo Stoakes]

On Thu, Jul 24, 2025 at 12:54:26PM +0200, Vlastimil Babka wrote:
> On 6/9/25 11:57, Vlastimil Babka wrote:
> > On 6/7/25 8:00 PM, John Hubbard wrote:
> >> On 6/7/25 6:53 AM, Lorenzo Stoakes wrote:
> >> The worst part is that if you go to reproduce a problem, you don't
> >> see the next warning in the logs!! This is devastating, especially if
> >> the site makes it hard to ask for a system reboot. (If you have
> >> ~20,000 nodes in the cluster, a reboot is not a small affair.)
> >
> > Assuming you know how to reproduce the problem... I wonder if it would
> > help if there was a way (sysctl?) to re-arm all the _ONCE warnings. It
> > shouldn't be that hard hopefully?
>
> Oh hey it already exists, since 2017
>
> echo 1 > /sys/kernel/debug/clear_warn_once

Ohhh! Nice!