RE: [PATCH 2/3] mm/lru_gen: add configuration option to select debugfs/procfs for lru_gen

wangzicheng
2025-11-28T07:19:04Z

> On 11/27/25 6:53 PM, Zicheng Wang wrote:
> > Signed-off-by: Zicheng Wang <wangzicheng@honor.com>
> > ---
> > mm/Kconfig | 10 ++++++++++
> > 1 file changed, 10 insertions(+)
> >
> > diff --git a/mm/Kconfig b/mm/Kconfig
> > index e443fe8cd..be7efa794 100644
> > --- a/mm/Kconfig
> > +++ b/mm/Kconfig
> > @@ -1325,6 +1325,16 @@ config LRU_GEN_STATS
> > config LRU_GEN_WALKS_MMU
> > def_bool y
> > depends on LRU_GEN && ARCH_HAS_HW_PTE_YOUNG
> > +
> > +config LRU_GEN_PROCFS_CTRL
> > + bool "Move lru_gen files from debugfs to procfs"
> > + depends on LRU_GEN && PROC_FS
> > + help
> > + Move lru_gen management from debugfs to procfs (/proc/lru_gen).
> > + This production-ready feature provides critical memory reclaim
> > + prediction and control. It is no longer experimental.
> > + The migration ensures availability in commercial products where
> > + debugfs may be disabled.
>
> A. missing patch description
> B. The help message above sounds like a patch description.
>

Thanks for the comments, will be fix in the next version.

> If someone does not enable this kconfig option, what happens?
> a. lru_gen files stay in debugfs
> b. lru_gen files are not present
> c. something else. If so, what?
>
>
> --
> ~Randy

Regard to the questions,
If this Kconfig option is enabled, the `lru_gen` and `lru_gen_full` files will appear under /proc/.
If it is not enabled, the files remain under debugfs, which is the current default behavior.

Thanks,
Zicheng