[Re: [PATCH 0/3] clear_warn_once: add timed interval resetting] On 29/11/2020 (Sun 19:08) Andi Kleen wrote:
> On Thu, Nov 26, 2020 at 01:30:26AM -0500, Paul Gortmaker wrote: > > But you currently can't make use of clear_warn_once unless you've got > > debugfs enabled and mounted - which may not be desired by some people > > in some deployment situations. > > Seems awfully special purpose. The problem with debugfs is security, > or is it no convenient process that could do cron like functionality? My understanding is that it is a bit of both. As users of rt tasks, they won't be running anything like cron that could add to OS jitter on the (presumably minimal) rootfs - so they were looking for a clean engineered solution with near zero overhead, that they could easily deploy on all nodes after the rt tuning was 99% completed and node images had been bundled. Just to be sure everything was operating as they'd aimed to achieve. I thought a boot arg (and the internal timer) seemed like a good fit to that requirement. No kernel or rootfs rebuilding required. And I figured others might be in the same boat and could use it too. Paul. -- > > If it's the first, perhaps what they really need is a way to get > a partial debugfs? > > -Andi
