Re: [Intel-gfx] [PATCH 06/10] drm/i915: move gem_objects slab to direct module init/exit

[Jason Ekstrand <jason@jlekstrand.net>]

On Fri, Jul 23, 2021 at 2:29 PM Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
>
> With the global kmem_cache shrink infrastructure gone there's nothing
> special and we can convert them over.
>
> I'm doing this split up into each patch because there's quite a bit of
> noise with removing the static global.slab_objects to just a
> slab_objects.
>
> Cc: Jason Ekstrand <jason@jlekstrand.net>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> ---
>  drivers/gpu/drm/i915/gem/i915_gem_object.c | 26 +++++++---------------
>  drivers/gpu/drm/i915/gem/i915_gem_object.h |  3 +++
>  drivers/gpu/drm/i915/i915_globals.c        |  1 -
>  drivers/gpu/drm/i915/i915_globals.h        |  1 -
>  drivers/gpu/drm/i915/i915_pci.c            |  1 +
>  5 files changed, 12 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
> index 5c21cff33199..53156250d283 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
> @@ -30,14 +30,10 @@
>  #include "i915_gem_context.h"
>  #include "i915_gem_mman.h"
>  #include "i915_gem_object.h"
> -#include "i915_globals.h"
>  #include "i915_memcpy.h"
>  #include "i915_trace.h"
>
> -static struct i915_global_object {
> -       struct i915_global base;
> -       struct kmem_cache *slab_objects;
> -} global;
> +struct kmem_cache *slab_objects;

static

With that,

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

>  static const struct drm_gem_object_funcs i915_gem_object_funcs;
>
> @@ -45,7 +41,7 @@ struct drm_i915_gem_object *i915_gem_object_alloc(void)
>  {
>         struct drm_i915_gem_object *obj;
>
> -       obj = kmem_cache_zalloc(global.slab_objects, GFP_KERNEL);
> +       obj = kmem_cache_zalloc(slab_objects, GFP_KERNEL);
>         if (!obj)
>                 return NULL;
>         obj->base.funcs = &i915_gem_object_funcs;
> @@ -55,7 +51,7 @@ struct drm_i915_gem_object *i915_gem_object_alloc(void)
>
>  void i915_gem_object_free(struct drm_i915_gem_object *obj)
>  {
> -       return kmem_cache_free(global.slab_objects, obj);
> +       return kmem_cache_free(slab_objects, obj);
>  }
>
>  void i915_gem_object_init(struct drm_i915_gem_object *obj,
> @@ -664,23 +660,17 @@ void i915_gem_init__objects(struct drm_i915_private *i915)
>         INIT_WORK(&i915->mm.free_work, __i915_gem_free_work);
>  }
>
> -static void i915_global_objects_exit(void)
> +void i915_objects_module_exit(void)
>  {
> -       kmem_cache_destroy(global.slab_objects);
> +       kmem_cache_destroy(slab_objects);
>  }
>
> -static struct i915_global_object global = { {
> -       .exit = i915_global_objects_exit,
> -} };
> -
> -int __init i915_global_objects_init(void)
> +int __init i915_objects_module_init(void)
>  {
> -       global.slab_objects =
> -               KMEM_CACHE(drm_i915_gem_object, SLAB_HWCACHE_ALIGN);
> -       if (!global.slab_objects)
> +       slab_objects = KMEM_CACHE(drm_i915_gem_object, SLAB_HWCACHE_ALIGN);
> +       if (!slab_objects)
>                 return -ENOMEM;
>
> -       i915_global_register(&global.base);
>         return 0;
>  }
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
> index f3ede43282dc..6d8ea62a372f 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
> @@ -48,6 +48,9 @@ static inline bool i915_gem_object_size_2big(u64 size)
>
>  void i915_gem_init__objects(struct drm_i915_private *i915);
>
> +void i915_objects_module_exit(void);
> +int i915_objects_module_init(void);
> +
>  struct drm_i915_gem_object *i915_gem_object_alloc(void);
>  void i915_gem_object_free(struct drm_i915_gem_object *obj);
>
> diff --git a/drivers/gpu/drm/i915/i915_globals.c b/drivers/gpu/drm/i915/i915_globals.c
> index dbb3d81eeea7..40a592fbc3e0 100644
> --- a/drivers/gpu/drm/i915/i915_globals.c
> +++ b/drivers/gpu/drm/i915/i915_globals.c
> @@ -30,7 +30,6 @@ static void __i915_globals_cleanup(void)
>  }
>
>  static __initconst int (* const initfn[])(void) = {
> -       i915_global_objects_init,
>         i915_global_request_init,
>         i915_global_scheduler_init,
>         i915_global_vma_init,
> diff --git a/drivers/gpu/drm/i915/i915_globals.h b/drivers/gpu/drm/i915/i915_globals.h
> index f16752dbbdbf..9734740708f4 100644
> --- a/drivers/gpu/drm/i915/i915_globals.h
> +++ b/drivers/gpu/drm/i915/i915_globals.h
> @@ -23,7 +23,6 @@ int i915_globals_init(void);
>  void i915_globals_exit(void);
>
>  /* constructors */
> -int i915_global_objects_init(void);
>  int i915_global_request_init(void);
>  int i915_global_scheduler_init(void);
>  int i915_global_vma_init(void);
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index 2b56e664d043..2334eb3e9abb 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -1301,6 +1301,7 @@ static const struct {
>         { i915_buddy_module_init, i915_buddy_module_exit },
>         { i915_context_module_init, i915_context_module_exit },
>         { i915_gem_context_module_init, i915_gem_context_module_exit },
> +       { i915_objects_module_init, i915_objects_module_exit },
>         { i915_globals_init, i915_globals_exit },
>         { i915_mock_selftests, NULL },
>         { i915_pmu_init, i915_pmu_exit },
> --
> 2.32.0
>
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