Commit 85246435 authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

mm/damon/paddr: support addr_unit for DAMOS_PAGEOUT 

Add support of addr_unit for DAMOS_PAGEOUT action handling from the DAMOS
operation implementation for the physical address space.

Link: https://lkml.kernel.org/r/20250828171242.59810-4-sj@kernel.org


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
Signed-off-by: default avatarQuanmin Yan <yanquanmin1@huawei.com>
Reviewed-by: default avatarSeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: ze zuo <zuoze1@huawei.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent d8096848

mm/damon/paddr.c

+23 −7
Original line number Diff line number Diff line
@@ -24,6 +24,19 @@ static phys_addr_t damon_pa_phys_addr( 
	return (phys_addr_t)addr * addr_unit;

}



static unsigned long damon_pa_core_addr(

		phys_addr_t pa, unsigned long addr_unit)

{

	/*

	 * Use div_u64() for avoiding linking errors related with __udivdi3,

	 * __aeabi_uldivmod, or similar problems.  This should also improve the

	 * performance optimization (read div_u64() comment for the detail).

	 */

	if (sizeof(pa) == 8 && sizeof(addr_unit) == 4)

		return div_u64(pa, addr_unit);

	return pa / addr_unit;

}



static void damon_pa_mkold(phys_addr_t paddr)

{

	struct folio *folio = damon_get_folio(PHYS_PFN(paddr));
@@ -135,10 +148,11 @@ static bool damon_pa_invalid_damos_folio(struct folio *folio, struct damos *s) 
	return false;

}



static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s,

static unsigned long damon_pa_pageout(struct damon_region *r,

		unsigned long addr_unit, struct damos *s,

		unsigned long *sz_filter_passed)

{

	unsigned long addr, applied;

	phys_addr_t addr, applied;

	LIST_HEAD(folio_list);

	bool install_young_filter = true;

	struct damos_filter *filter;
@@ -159,8 +173,8 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s, 
		damos_add_filter(s, filter);

	}



	addr = r->ar.start;

	while (addr < r->ar.end) {

	addr = damon_pa_phys_addr(r->ar.start, addr_unit);

	while (addr < damon_pa_phys_addr(r->ar.end, addr_unit)) {

		folio = damon_get_folio(PHYS_PFN(addr));

		if (damon_pa_invalid_damos_folio(folio, s)) {

			addr += PAGE_SIZE;
@@ -170,7 +184,7 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s, 
		if (damos_pa_filter_out(s, folio))

			goto put_folio;

		else

			*sz_filter_passed += folio_size(folio);

			*sz_filter_passed += folio_size(folio) / addr_unit;



		folio_clear_referenced(folio);

		folio_test_clear_young(folio);
@@ -189,7 +203,7 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s, 
	applied = reclaim_pages(&folio_list);

	cond_resched();

	s->last_applied = folio;

	return applied * PAGE_SIZE;

	return damon_pa_core_addr(applied * PAGE_SIZE, addr_unit);

}



static inline unsigned long damon_pa_mark_accessed_or_deactivate(
@@ -302,9 +316,11 @@ static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx, 
		struct damon_target *t, struct damon_region *r,

		struct damos *scheme, unsigned long *sz_filter_passed)

{

	unsigned long aunit = ctx->addr_unit;



	switch (scheme->action) {

	case DAMOS_PAGEOUT:

		return damon_pa_pageout(r, scheme, sz_filter_passed);

		return damon_pa_pageout(r, aunit, scheme, sz_filter_passed);

	case DAMOS_LRU_PRIO:

		return damon_pa_mark_accessed(r, scheme, sz_filter_passed);

	case DAMOS_LRU_DEPRIO: