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B293Amr7AqjVWE1I= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/24/25 3:56 AM, Lorenzo Stoakes wrote: > 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! WOW, how did I go all this time without knowing about that? It's just what I always wanted! :) thanks, -- John Hubbard