Re: [RFC PATCH v4 0/6] Promotion of Unmapped Page Cache Folios.

[Gregory Price]

On Sat, Apr 12, 2025 at 12:49:18AM +0100, Matthew Wilcox wrote:
> On Fri, Apr 11, 2025 at 06:11:05PM -0400, Gregory Price wrote:
> > Unmapped page cache pages can be demoted to low-tier memory, but
> 
> No.  Page cache should never be demoted to low-tier memory.
> NACK this patchset.

This wasn't a statement of approval page cache being on lower tiers,
it's a statement of fact.  Enabling demotion causes this issue.

~Gregory