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mm/damon/paddr: do page level access check for pageout DAMOS action on its own 

'pageout' DAMOS action implementation of 'paddr' DAMON operations set asks
reclaim_pages() to do page level access check if the user is not asking
DAMOS to do that on its own.  Simplify the logic by making the check
always be done by 'paddr'.

Link: https://lkml.kernel.org/r/20240429224451.67081-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2024-04-29 15:44:49 -07:00 committed by Andrew Morton
parent 69a5f99917
commit ebd3f70c63
1 changed files with 12 additions and 4 deletions
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16
mm/damon/paddr.c
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@ -244,16 +244,22 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s)
{ {
unsigned long addr, applied; unsigned long addr, applied;
LIST_HEAD(folio_list); LIST_HEAD(folio_list);
bool ignore_references = false; bool install_young_filter = true;
struct damos_filter *filter; struct damos_filter *filter;
/* respect user's page level reference check handling request */ /* check access in page level again by default */
damos_for_each_filter(filter, s) { damos_for_each_filter(filter, s) {
if (filter->type == DAMOS_FILTER_TYPE_YOUNG) { if (filter->type == DAMOS_FILTER_TYPE_YOUNG) {
ignore_references = true; install_young_filter = false;
break; break;
} }
} }
if (install_young_filter) {
filter = damos_new_filter(DAMOS_FILTER_TYPE_YOUNG, true);
if (!filter)
return 0;
damos_add_filter(s, filter);
}
for (addr = r->ar.start; addr < r->ar.end; addr += PAGE_SIZE) { for (addr = r->ar.start; addr < r->ar.end; addr += PAGE_SIZE) {
struct folio *folio = damon_get_folio(PHYS_PFN(addr)); struct folio *folio = damon_get_folio(PHYS_PFN(addr));
@ -275,7 +281,9 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s)
put_folio: put_folio:
folio_put(folio); folio_put(folio);
} }
applied = reclaim_pages(&folio_list, ignore_references); if (install_young_filter)
damos_destroy_filter(filter);
applied = reclaim_pages(&folio_list, true);
cond_resched(); cond_resched();
return applied * PAGE_SIZE; return applied * PAGE_SIZE;
} }