Re: [v9 PATCH 13/13] mm: vmscan: shrink deferred objects proportional to priority

[Shakeel Butt]

On Wed, Mar 10, 2021 at 10:54 AM Yang Shi <shy828301@xxxxxxxxx> wrote:
>
> On Wed, Mar 10, 2021 at 10:24 AM Shakeel Butt <shakeelb@xxxxxxxxxx> wrote:
> >
> > On Wed, Mar 10, 2021 at 9:46 AM Yang Shi <shy828301@xxxxxxxxx> wrote:
> > >
> > > The number of deferred objects might get windup to an absurd number, and it
> > > results in clamp of slab objects.  It is undesirable for sustaining workingset.
> > >
> > > So shrink deferred objects proportional to priority and cap nr_deferred to twice
> > > of cache items.
> > >
> > > The idea is borrowed from Dave Chinner's patch:
> > > https://lore.kernel.org/linux-xfs/20191031234618.15403-13-david@xxxxxxxxxxxxx/
> > >
> > > Tested with kernel build and vfs metadata heavy workload in our production
> > > environment, no regression is spotted so far.
> >
> > Did you run both of these workloads in the same cgroup or separate cgroups?
>
> Both are covered.
>

Have you tried just this patch i.e. without the first 12 patches?