From nobody Wed Apr 8 03:07:14 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70F63C433FE for ; Fri, 21 Oct 2022 16:39:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231197AbiJUQjN (ORCPT ); Fri, 21 Oct 2022 12:39:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231165AbiJUQiP (ORCPT ); Fri, 21 Oct 2022 12:38:15 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D59192859B4 for ; Fri, 21 Oct 2022 09:37:36 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-36772c0c795so33791817b3.23 for ; Fri, 21 Oct 2022 09:37:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=b10z9K2d7yL2NkYZoSYI1eqym2z6cE2oNjVSRM+YxM4=; b=RdBFlvTWkP0mOj/+10aeT3pEp8gO1xe67MKNQAL9eJH8ygvwfl65HnLVJ/TXb07S8J Ekg4eIzJiS8mFJVRjcHyYUexaJ2Wpz0KD24tdJaK9vQvVpzHw4Swadb/CS9sPPIaClpx a4pSknIHqn7yKEu2xGQn6BM9ClrfpieKDQTxfc134vaHcOGtZtUzcwwZ/+hyo2Y9SDbU EqxOcGGs64poU/YYQXMdII6wUC0HnwMTfwDML9Jw5n3ISsd1571avOMoRlykby8HbVOv iidSXRx0txEQjxJng6lLm/tQXQGCk4PTQsXMvO/tZsN0O2ZrP+47TYzob91093CTHxXV vE5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=b10z9K2d7yL2NkYZoSYI1eqym2z6cE2oNjVSRM+YxM4=; b=ugRGnq3Otogx+T2tmhZUiCeEjyUgUxsc+Z8ijVoLEn/k0gE+yx4FZ7SyqxRBiBvgfr h/OmZ2+cog51m7tdIDGtBcjhOKzQOrRolgYq4gNn5D2xtiM2qd1ZtUVmfujKKaTEH8LH ZYmSTuw2djMJEx2aUEQAVE9UqOjSuV+g4vFt1MSfSyaOpuLNk3xaG9dAlTs1r9T084Ga +/3N+qJmbolSNWIlxkjf6RXy8dcABYzif7yVHF7UzjqVuT55SM75OcnEP5spsKDIyVdk g+KlujAqvXr343olNXJiH+piKuT6a7ZY5ZTIbZWOp/Vur7JKPE1V9MAsBSGPJ6ET8It6 MwOw== X-Gm-Message-State: ACrzQf2DlbhLWtgrhGwe1GSgS12MPEOO5TADZN6TyKONKVWBbfJR961k 9LQybsqY6L9hJOLjDp4rK8bPp1dIL9kAf6Wt X-Google-Smtp-Source: AMsMyM4a1Xbq88agbnwbbrlQOayFRrDGXm2X6sV7Iqp0l2y6+5WLGgjVLDxiqSHzLLJPyqPxXNBrDUUp2xxQ0SZu X-Received: from jthoughton.c.googlers.com ([fda3:e722:ac3:cc00:14:4d90:c0a8:2a4f]) (user=jthoughton job=sendgmr) by 2002:a81:8d14:0:b0:361:4e59:a90e with SMTP id d20-20020a818d14000000b003614e59a90emr17171702ywg.288.1666370255675; Fri, 21 Oct 2022 09:37:35 -0700 (PDT) Date: Fri, 21 Oct 2022 16:36:37 +0000 In-Reply-To: <20221021163703.3218176-1-jthoughton@google.com> Mime-Version: 1.0 References: <20221021163703.3218176-1-jthoughton@google.com> X-Mailer: git-send-email 2.38.0.135.g90850a2211-goog Message-ID: <20221021163703.3218176-22-jthoughton@google.com> Subject: [RFC PATCH v2 21/47] mm: rmap: provide pte_order in page_vma_mapped_walk From: James Houghton To: Mike Kravetz , Muchun Song , Peter Xu Cc: David Hildenbrand , David Rientjes , Axel Rasmussen , Mina Almasry , "Zach O'Keefe" , Manish Mishra , Naoya Horiguchi , "Dr . David Alan Gilbert" , "Matthew Wilcox (Oracle)" , Vlastimil Babka , Baolin Wang , Miaohe Lin , Yang Shi , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, James Houghton Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" page_vma_mapped_walk callers will need this information to know how HugeTLB pages are mapped. pte_order only applies if pte is not NULL. Signed-off-by: James Houghton --- include/linux/rmap.h | 1 + mm/page_vma_mapped.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/linux/rmap.h b/include/linux/rmap.h index bd3504d11b15..e0557ede2951 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -378,6 +378,7 @@ struct page_vma_mapped_walk { pmd_t *pmd; pte_t *pte; spinlock_t *ptl; + unsigned int pte_order; unsigned int flags; }; =20 diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c index 93e13fc17d3c..395ca4e21c56 100644 --- a/mm/page_vma_mapped.c +++ b/mm/page_vma_mapped.c @@ -16,6 +16,7 @@ static inline bool not_found(struct page_vma_mapped_walk = *pvmw) static bool map_pte(struct page_vma_mapped_walk *pvmw) { pvmw->pte =3D pte_offset_map(pvmw->pmd, pvmw->address); + pvmw->pte_order =3D 0; if (!(pvmw->flags & PVMW_SYNC)) { if (pvmw->flags & PVMW_MIGRATION) { if (!is_swap_pte(*pvmw->pte)) @@ -174,6 +175,7 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *= pvmw) if (!pvmw->pte) return false; =20 + pvmw->pte_order =3D huge_page_order(hstate); pvmw->ptl =3D huge_pte_lock(hstate, mm, pvmw->pte); if (!check_pte(pvmw)) return not_found(pvmw); @@ -269,6 +271,7 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *= pvmw) } pte_unmap(pvmw->pte); pvmw->pte =3D NULL; + pvmw->pte_order =3D 0; goto restart; } pvmw->pte++; --=20 2.38.0.135.g90850a2211-goog