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DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1784776110; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zh1iI5mLWpS+VDOHW4U6amM9imbdnYQ7KT34I489wBU=; b=NhdfXIrwsO0SAJE6eS2ihTQzVD7bTOUjzd2G6m2sDiOfn7RYt4rUE72Mp0/GFM9TD+Mv25 qAmyRQ6ORtzakAFm5N2bsLy0ppXzjSZQGdSpEmd1Kc+p1r1GqTloszuf17VWBHsuhNrCTE JloJHT2tyJg6gororePhQOabkEK1Kb8= From: Hongfu Li To: akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, hongfu.li@linux.dev, Hongfu Li Subject: [PATCH v2 1/2] mm: Use a folio in the softleaf_is_device_private path Date: Thu, 23 Jul 2026 11:07:51 +0800 Message-ID: <20260723030752.16979-2-hongfu.li@linux.dev> In-Reply-To: <20260723030752.16979-1-hongfu.li@linux.dev> References: <20260723030752.16979-1-hongfu.li@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 8CF141A0004 X-Stat-Signature: rbuozk1naprpyoxhie5gfwt4chxetomh X-HE-Tag: 1784776111-405571 X-HE-Meta: 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 yLagEDCp s0Jhv6aGeD7wwH3tPPJ4tYGYjSXNkBSolTs0T1TeMVJvb76xLqupIAYB1Itchrl+W/JdPJvW+Ap61UASAqaaRXCthEopKO3vrpsjQPvvpA57R38qPzx1d8g/YCAfkFxspTV6Rl5n6CtBjhqJsTYG7vve4fv10I8KkX4NLZ//r1zkQRVX4T3HJluCy1sk1voG+cMYQIm0K5WGTbZSR6YP7WgARbJAWRPMzVAuk2aQDt7qNCMk9+KFPQz3iQpWgp46PShdBcC4sblVpJGlK3iFDFhOBUQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Hongfu Li Use the folio APIs in the device_private migration path of do_swap_page(), replacing four calls to compound_head() with one. Signed-off-by: Hongfu Li Acked-by: David Hildenbrand (Arm) --- mm/memory.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index d5e87624f692..ae521baa8c84 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4871,18 +4871,19 @@ vm_fault_t do_swap_page(struct vm_fault *vmf) goto unlock; /* - * Get a page reference while we know the page can't be + * Get a folio reference while we know the folio can't be * freed. */ - if (trylock_page(vmf->page)) { + folio = page_folio(vmf->page); + if (folio_trylock(folio)) { struct dev_pagemap *pgmap; - get_page(vmf->page); + folio_get(folio); pte_unmap_unlock(vmf->pte, vmf->ptl); pgmap = page_pgmap(vmf->page); ret = pgmap->ops->migrate_to_ram(vmf); - unlock_page(vmf->page); - put_page(vmf->page); + folio_unlock(folio); + folio_put(folio); } else { pte_unmap(vmf->pte); softleaf_entry_wait_on_locked(entry, vmf->ptl); -- 2.54.0