Re: [PATCH] mm/madvise: reclaim isolated folios if PTE restart fails

[Gregory Price]

On Tue, Sep 15, 2026 at 04:55:47PM +0100, Lorenzo Stoakes (ARM) wrote:
> On Sat, Sep 12, 2026 at 07:08:32AM -0400, Gregory Price wrote:
> > MADV_PAGEOUT collects isolated folios on a local list before reclaiming
> > them after the PTE walk.  The reschedule path drops the PTE lock and then
> > restarts the mapping with pte_offset_map_lock().
> 
> Is this reschedule path even necessary? It's pretty bloody sketchy.
> 
> I thought the modern approach (TM) was to not do cond_resched() and friends so
> can we actually look at removing this?
> 

Sorry - meant to reply to this.

Honestly there's so much jammed into this function i can't give you a
straight answer. I can take a short detour to figure out if we can
rework this as a whole.

~Gregory