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nvmap: dynamically allocate nvmap page pool shrinker

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Dynamically allocate the nvmpa pagepool shrinker as
shrinker register and unregister get removed from
Linux 6.7.

Based on change:
***
commit 86298d8b8ceacc17d0192cd6412d2773ff51b27f
Author: Qi Zheng <zhengqi.arch@bytedance.com>

    md/raid5: dynamically allocate the md-raid5 shrinker
***

Bug 4346767

Change-Id: Idbe40753f79481d85e5899d2905039860d39dc5e
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3020001
(cherry picked from commit fc748158cc)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3036794
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
Tested-by: Jonathan Hunter <jonathanh@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Laxman Dewangan
2023-11-21 16:52:56 +00:00
committed by mobile promotions
parent 6b290b7f84
commit 0ca520ee30
2 changed files with 28 additions and 0 deletions
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6
Makefile
View File

@@ -53,6 +53,12 @@ subdir-ccflags-y += -DNV_V4L2_ASYNC_NF_SUBDEVICE_INIT_RENAME
export CONFIG_SKIP_CRYPTO=y
endif
# Changes done in Linux 6.7 onwards
ifeq ($(shell test $(LINUX_VERSION) -ge $(LINUX_VERSION_6_7); echo $$?),0)
# Support enable to allocate shrinker dynamically
subdir-ccflags-y += -DNV_NVMAP_DYNAMIC_SHRINKER_ALLOC_SUPPORT
endif
ifeq ($(CONFIG_TEGRA_VIRTUALIZATION),y)
subdir-ccflags-y += -DCONFIG_TEGRA_VIRTUALIZATION
endif

22
drivers/video/tegra/nvmap/nvmap_pp.c
View File

@@ -581,11 +581,15 @@ static unsigned long nvmap_page_pool_scan_objects(struct shrinker *shrinker,
SHRINK_STOP : (sc->nr_to_scan - remaining);
}
#if defined(NV_NVMAP_DYNAMIC_SHRINKER_ALLOC_SUPPORT)
static struct shrinker *nvmap_page_pool_shrinker;
#else
static struct shrinker nvmap_page_pool_shrinker = {
.count_objects = nvmap_page_pool_count_objects,
.scan_objects = nvmap_page_pool_scan_objects,
.seeks = 1,
};
#endif
static void shrink_page_pools(unsigned long *total_pages, unsigned long *available_pages)
{
@@ -771,10 +775,23 @@ int nvmap_page_pool_init(struct nvmap_device *dev)
NULL, "nvmap-bz");
if (IS_ERR(background_allocator))
goto fail;
#if defined(NV_NVMAP_DYNAMIC_SHRINKER_ALLOC_SUPPORT)
nvmap_page_pool_shrinker = shrinker_alloc(0, "nvmap_pp_shrinker");
if (!nvmap_page_pool_shrinker) {
goto fail;
}
nvmap_page_pool_shrinker->count_objects = nvmap_page_pool_count_objects;
nvmap_page_pool_shrinker->scan_objects = nvmap_page_pool_scan_objects;
nvmap_page_pool_shrinker->seeks = 1;
shrinker_register(nvmap_page_pool_shrinker);
#else
#if defined(NV_REGISTER_SHRINKER_HAS_FMT_ARG) /* Linux v6.0 */
register_shrinker(&nvmap_page_pool_shrinker, "nvmap_pp_shrinker");
#else
register_shrinker(&nvmap_page_pool_shrinker);
#endif
#endif
return 0;
@@ -793,7 +810,12 @@ int nvmap_page_pool_fini(struct nvmap_device *dev)
* registered
*/
if (!IS_ERR_OR_NULL(background_allocator)) {
#if defined(NV_NVMAP_DYNAMIC_SHRINKER_ALLOC_SUPPORT)
shrinker_free(nvmap_page_pool_shrinker);
nvmap_page_pool_shrinker = NULL;
#else
unregister_shrinker(&nvmap_page_pool_shrinker);
#endif
kthread_stop(background_allocator);
background_allocator = NULL;
}