Hi SeongJae,
On Sun, Mar 31, 2024 at 12:09 PM SeongJae Park <sj@xxxxxxxxxx> wrote:
>
> Hi Ho-Ren,
>
> On Fri, 29 Mar 2024 05:33:52 +0000 "Ho-Ren (Jack) Chuang" <horenchuang@xxxxxxxxxxxxx> wrote:
>
> > Since different memory devices require finding, allocating, and putting
> > memory types, these common steps are abstracted in this patch,
> > enhancing the scalability and conciseness of the code.
> >
> > Signed-off-by: Ho-Ren (Jack) Chuang <horenchuang@xxxxxxxxxxxxx>
> > Reviewed-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
> > ---
> > drivers/dax/kmem.c | 20 ++------------------
> > include/linux/memory-tiers.h | 13 +++++++++++++
> > mm/memory-tiers.c | 32 ++++++++++++++++++++++++++++++++
> > 3 files changed, 47 insertions(+), 18 deletions(-)
> >
> [...]
> > diff --git a/include/linux/memory-tiers.h b/include/linux/memory-tiers.h
> > index 69e781900082..a44c03c2ba3a 100644
> > --- a/include/linux/memory-tiers.h
> > +++ b/include/linux/memory-tiers.h
> > @@ -48,6 +48,9 @@ int mt_calc_adistance(int node, int *adist);
> > int mt_set_default_dram_perf(int nid, struct access_coordinate *perf,
> > const char *source);
> > int mt_perf_to_adistance(struct access_coordinate *perf, int *adist);
> > +struct memory_dev_type *mt_find_alloc_memory_type(int adist,
> > + struct list_head *memory_types);
> > +void mt_put_memory_types(struct list_head *memory_types);
> > #ifdef CONFIG_MIGRATION
> > int next_demotion_node(int node);
> > void node_get_allowed_targets(pg_data_t *pgdat, nodemask_t *targets);
> > @@ -136,5 +139,15 @@ static inline int mt_perf_to_adistance(struct access_coordinate *perf, int *adis
> > {
> > return -EIO;
> > }
> > +
> > +struct memory_dev_type *mt_find_alloc_memory_type(int adist, struct list_head *memory_types)
> > +{
> > + return NULL;
> > +}
> > +
> > +void mt_put_memory_types(struct list_head *memory_types)
> > +{
> > +
> > +}
>
> I found latest mm-unstable tree is failing kunit as below, and 'git bisect'
> says it happens from this patch.
>
> $ ./tools/testing/kunit/kunit.py run --build_dir ../kunit.out/
> [11:56:40] Configuring KUnit Kernel ...
> [11:56:40] Building KUnit Kernel ...
> Populating config with:
> $ make ARCH=um O=../kunit.out/ olddefconfig
> Building with:
> $ make ARCH=um O=../kunit.out/ --jobs=36
> ERROR:root:In file included from .../mm/memory.c:71:
> .../include/linux/memory-tiers.h:143:25: warning: no previous prototype for ‘mt_find_alloc_memory_type’ [-Wmissing-prototypes]
> 143 | struct memory_dev_type *mt_find_alloc_memory_type(int adist, struct list_head *memory_types)
> | ^~~~~~~~~~~~~~~~~~~~~~~~~
> .../include/linux/memory-tiers.h:148:6: warning: no previous prototype for ‘mt_put_memory_types’ [-Wmissing-prototypes]
> 148 | void mt_put_memory_types(struct list_head *memory_types)
> | ^~~~~~~~~~~~~~~~~~~
> [...]
>
> Maybe we should set these as 'static inline', like below? I confirmed this
> fixes the kunit error. May I ask your opinion?
>
Thanks for catching this. I'm trying to figure out this problem. Will get back.
>
> diff --git a/include/linux/memory-tiers.h b/include/linux/memory-tiers.h
> index a44c03c2ba3a..ee6e53144156 100644
> --- a/include/linux/memory-tiers.h
> +++ b/include/linux/memory-tiers.h
> @@ -140,12 +140,12 @@ static inline int mt_perf_to_adistance(struct access_coordinate *perf, int *adis
> return -EIO;
> }
>
> -struct memory_dev_type *mt_find_alloc_memory_type(int adist, struct list_head *memory_types)
> +static inline struct memory_dev_type *mt_find_alloc_memory_type(int adist, struct list_head *memory_types)
> {
> return NULL;
> }
>
> -void mt_put_memory_types(struct list_head *memory_types)
> +static inline void mt_put_memory_types(struct list_head *memory_types)
> {
>
> }
>
>
> Thanks,
> SJ
--
Best regards,
Ho-Ren (Jack) Chuang
莊賀任
