Re: kern/57558: pgdaemon 100% busy - no scanning (ZFS case)

[Chuck Silvers <chuq%chuq.com@localhost>]

great, thanks for testing.

which other cases are you talking about?

-Chuck


On Thu, May 09, 2024 at 07:26:01PM +0200, Frank Kardel wrote:
> Thanks for that simpler fix to avoid the starvation state. Test have shown
> that that works in the
> 
> environment.
> 
> I am wondering, though, whether something needs to be done for the other
> cases.
> 
> -Frank
> 
> 
> On 05/06/24 08:05, Chuck Silvers wrote:
> > [snip]
> > I think the right fix for this is to increase the amount of kmem space that we
> > allocate such that all of physical memory can be allocated as kmem without
> > the pagedaemon considering the system to be starved for kmem virtual space.
> > this means allocating an enough kmem space for 10/9 of physical memory,
> > so that even though only 9/10 of kmem virtual space can be used, there is still
> > enough kmem virtual space available for all of physical memory.
> > 
> > please try the attached patch.
> > 
> > -Chuck