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Thu, 4 Jul 2024 04:32:25 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id WC9sJdklhmbnDAAAD6G6ig (envelope-from ); Thu, 04 Jul 2024 04:32:25 +0000 From: Oscar Salvador To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Peter Xu , Muchun Song , David Hildenbrand , SeongJae Park , Miaohe Lin , Michal Hocko , Matthew Wilcox , Christophe Leroy , Oscar Salvador Subject: [PATCH 29/45] mm/damon: Create damon_mkold_pud_entry to handle PUD-mapped hugetlb vmas Date: Thu, 4 Jul 2024 06:31:16 +0200 Message-ID: <20240704043132.28501-30-osalvador@suse.de> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240704043132.28501-1-osalvador@suse.de> References: <20240704043132.28501-1-osalvador@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spamd-Result: default: False [-6.80 / 50.00]; REPLY(-4.00)[]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCVD_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCPT_COUNT_TWELVE(0.00)[12]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; R_RATELIMIT(0.00)[to_ip_from(RLghcz9uomn9ay1xnuhrww8uur)]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-Spam-Score: -6.80 X-Spam-Level: Content-Type: text/plain; charset="utf-8" Normal THP cannot be PUD-mapped (besides devmap), but hugetlb can, so create damon_mkold_pud_entry in order to handle PUD-mapped hugetlb vmas. Signed-off-by: Oscar Salvador --- mm/damon/vaddr.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index 47c84cdda32c..6a383ce5a775 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -329,6 +329,37 @@ static int damon_mkold_pmd_entry(pmd_t *pmd, unsigned = long addr, return 0; } =20 +static int damon_mkold_pud_entry(pmd_t *pud, unsigned long addr, + unsigned long next, struct mm_walk *walk) +{ +#ifdef CONFIG_PGTABLE_HAS_HUGE_LEAVES + spinlock_t *ptl; + struct folio *folio; + struct vm_area_struct *vma =3D walk->vma; + unsigned long size =3D huge_page_size(hstate_vma(vma)); + + ptl =3D pud_huge_lock(vma, pud); + if (!ptl) + return 0; + + if (!pud_present(*pud)) + goto out; + + folio =3D pfn_folio(pud_pfn(*pud)); + folio_get(folio); + + if (pudp_test_and_clear_young(vma, addr, pud) || + mmu_notifier_clear_young(mm, addr, addr + size)) + folio_set_young(folio); + + folio_set_idle(folio); + folio_put(folio); +out: + spin_unlock(ptl); +#endif + return 0; +} + #ifdef CONFIG_HUGETLB_PAGE static void damon_hugetlb_mkold(pte_t *pte, struct mm_struct *mm, struct vm_area_struct *vma, unsigned long addr) @@ -383,6 +414,7 @@ static int damon_mkold_hugetlb_entry(pte_t *pte, unsign= ed long hmask, #endif /* CONFIG_HUGETLB_PAGE */ =20 static const struct mm_walk_ops damon_mkold_ops =3D { + .pud_entry =3D damon_mkold_pud_entry, .pmd_entry =3D damon_mkold_pmd_entry, .hugetlb_entry =3D damon_mkold_hugetlb_entry, .walk_lock =3D PGWALK_RDLOCK, --=20 2.26.2