android/android_kernel_samsung_sm8650
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ANDROID: add reclaim tune parameter functions

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This patch adds two exported functions to set/get reclaim parameters.

Bug: 323406883
Change-Id: I8c29073dba3e77cb5db7f45b640518deae04b8a9
Signed-off-by: Minchan Kim <minchan@google.com>
This commit is contained in:
Minchan Kim 2024-04-06 01:05:28 +00:00
parent 27c443059c
commit 66193f866d
2 changed files with 27 additions and 0 deletions
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3
include/linux/gfp.h
View File

@ -351,6 +351,9 @@ static inline bool pm_suspended_storage(void)
}
#endif /* CONFIG_PM_SLEEP */
int set_reclaim_params(int wmark_scale_factor, int swappiness);
void get_reclaim_params(int *wmark_scale_factor, int *swappiness);
#ifdef CONFIG_CONTIG_ALLOC
/* The below functions must be run on a range from a single zone. */
extern int alloc_contig_range(unsigned long start, unsigned long end,

24
mm/page_alloc.c
View File

@ -536,6 +536,30 @@ static inline int pfn_to_bitidx(const struct page *page, unsigned long pfn)
return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
}
int set_reclaim_params(int wmark_scale_factor, int swappiness)
{
if (wmark_scale_factor > 3000 || wmark_scale_factor < 1)
return -EINVAL;
if (swappiness > 200 || swappiness < 0)
return -EINVAL;
WRITE_ONCE(vm_swappiness, swappiness);
WRITE_ONCE(watermark_scale_factor, wmark_scale_factor);
setup_per_zone_wmarks();
return 0;
}
EXPORT_SYMBOL_GPL(set_reclaim_params);
void get_reclaim_params(int *wmark_scale_factor, int *swappiness)
{
*wmark_scale_factor = watermark_scale_factor;
*swappiness = vm_swappiness;
}
EXPORT_SYMBOL_GPL(get_reclaim_params);
static __always_inline
unsigned long __get_pfnblock_flags_mask(const struct page *page,
unsigned long pfn,