Re: [PATCH] audit: add backlog high water mark metric

From: Paul Moore

Date: Wed Apr 15 2026 - 11:24:22 EST


On Wed, Apr 15, 2026 at 11:19 AM Paul Moore <paul@xxxxxxxxxxxxxx> wrote:
> On Tue, Apr 14, 2026 at 11:45 PM Steve Grubb <sgrubb@xxxxxxxxxx> wrote:
> > On Friday, April 10, 2026 5:34:08 PM Eastern Daylight Time Paul Moore wrote:
> > > On Mon, Mar 23, 2026 at 11:07 AM Ricardo Robaina <rrobaina@xxxxxxxxxx>
> > wrote:
> >
>
> ...
>
> > ... compliance-driven systems that must use a finite backlog limit for memory safety but cannot tolerate dropped events ...
>
> You must pick one of those two requirements, or at the very least
> prioritize them; it is simply impossible to both limit the backlog
> queue and require zero dropped events.

To be perfectly honest, it's also impossible to require zero dropped
events. Even in the most extreme configurations where the admin
decides to panic the system, that only happens once the system reaches
the point where it is dropping events. We try *really* hard to not
drop events, but it is always going to be a possibility.


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