From nobody Mon Feb 9 15:59:19 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 60BD5C77B73 for ; Mon, 22 May 2023 05:05:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231708AbjEVFFX (ORCPT ); Mon, 22 May 2023 01:05:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231694AbjEVFFU (ORCPT ); Mon, 22 May 2023 01:05:20 -0400 Received: from mail-yb1-xb2c.google.com (mail-yb1-xb2c.google.com [IPv6:2607:f8b0:4864:20::b2c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 04652E9 for ; Sun, 21 May 2023 22:05:19 -0700 (PDT) Received: by mail-yb1-xb2c.google.com with SMTP id 3f1490d57ef6-b9daef8681fso4783618276.1 for ; Sun, 21 May 2023 22:05:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1684731919; x=1687323919; h=mime-version:references:message-id:in-reply-to:subject:cc:to:from :date:from:to:cc:subject:date:message-id:reply-to; bh=Q9fqf/aXpqllLgdqCnqVNZO09v0Ag5UU0wZCu2wmsUs=; b=OKj/gvd6hObldwT6K4phcbvAmhbsjul6iPbLRzKjs71jzjUwd6r3e8xCWCNZVwPENy 0HaWB0qgO/fNnS/Ois67og8DBdTyq3v/IDNkLAR46vDKiCQUR3xPJoyU7eFLCu5OCUxu ene9fgjo5yHZ3AS4/uG54DbEfQUuxcpEJxYx8UgryAp+t99VA5jZFAwJV246EE9mtg1F OZdfnZLlti+W2fNxVTHpJKMKRYyeIyeNsz3sd1gR6zvPQCCVQ9jZz+INsTuvonpNhmYF Bm782lSdhp0xDJA2N1jyxGLFmtKZ57I/CBr/DUG8sWZnMiCyq1l9BTQfv5dwSU+wKfRJ U63g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684731919; x=1687323919; h=mime-version:references:message-id:in-reply-to:subject:cc:to:from :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Q9fqf/aXpqllLgdqCnqVNZO09v0Ag5UU0wZCu2wmsUs=; b=FbAWxP75Sxkv1o8ghhO5EebgDFgN1xxVBnpRxQSPLVGvrZu+l4Zy5oX4Ub+Nta1gML OiFlWdGZFL1qZiMWfdI6XkZq5xHtKMGFLxtiJEAfbd2cgQnRMPie8pNMRi4cL+kKKV3+ WeGvRsduYYzFT1kYASvE4wfLXwwzUAk8llXiU+CrfrvSFsRYz619og6nwrsMyaQpEjIb 9QrOECUHZLElPEKfa448+Zy1Efab9JEbLn1aT/oPPhPFoobGfAfCI7bLBNHDazqhu6lt gSIhbPaWR0fLbsyqQPg4nmUwyv8mHDH/YTwpOzmrXOvEZJ6k9WqrnnmQTh3ZZKKmRRWJ lqLw== X-Gm-Message-State: AC+VfDyzJ/5a8r7C55u8YS3eIQXYFk0fGH7pK7wFJ3BZ0nCOl18W77Cd INa1x4yvnJjjwz1rwfhnbpUn6A== X-Google-Smtp-Source: ACHHUZ5Raj9TudeXZElbzzsJbxf03YA3/zAVWdObhAbA8Pr6yvbRJfnYmXwklG1UR7VtuXWIGmLBMQ== X-Received: by 2002:a25:fa12:0:b0:ba8:1c9e:c77f with SMTP id b18-20020a25fa12000000b00ba81c9ec77fmr9327198ybe.22.1684731919014; Sun, 21 May 2023 22:05:19 -0700 (PDT) Received: from ripple.attlocal.net (172-10-233-147.lightspeed.sntcca.sbcglobal.net. [172.10.233.147]) by smtp.gmail.com with ESMTPSA id a12-20020a25938c000000b00ba87e9b5bf9sm1274482ybm.45.2023.05.21.22.05.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 May 2023 22:05:18 -0700 (PDT) Date: Sun, 21 May 2023 22:05:15 -0700 (PDT) From: Hugh Dickins X-X-Sender: hugh@ripple.attlocal.net To: Andrew Morton cc: Mike Kravetz , Mike Rapoport , "Kirill A. Shutemov" , Matthew Wilcox , David Hildenbrand , Suren Baghdasaryan , Qi Zheng , Yang Shi , Mel Gorman , Peter Xu , Peter Zijlstra , Will Deacon , Yu Zhao , Alistair Popple , Ralph Campbell , Ira Weiny , Steven Price , SeongJae Park , Naoya Horiguchi , Christophe Leroy , Zack Rusin , Jason Gunthorpe , Axel Rasmussen , Anshuman Khandual , Pasha Tatashin , Miaohe Lin , Minchan Kim , Christoph Hellwig , Song Liu , Thomas Hellstrom , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 13/31] mm/hmm: retry if pte_offset_map() fails In-Reply-To: <68a97fbe-5c1e-7ac6-72c-7b9c6290b370@google.com> Message-ID: <2edc4657-b6ff-3d6e-2342-6b60bfccc5b@google.com> References: <68a97fbe-5c1e-7ac6-72c-7b9c6290b370@google.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" hmm_vma_walk_pmd() is called through mm_walk, but already has a goto again loop of its own, so take part in that if pte_offset_map() fails. Signed-off-by: Hugh Dickins Reviewed-by: Alistair Popple --- mm/hmm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/hmm.c b/mm/hmm.c index e23043345615..b1a9159d7c92 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -381,6 +381,8 @@ static int hmm_vma_walk_pmd(pmd_t *pmdp, } =20 ptep =3D pte_offset_map(pmdp, addr); + if (!ptep) + goto again; for (; addr < end; addr +=3D PAGE_SIZE, ptep++, hmm_pfns++) { int r; =20 --=20 2.35.3