From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f182.google.com (mail-pf1-f182.google.com [209.85.210.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6FFA415A0 for ; Sun, 16 Jul 2023 03:12:19 +0000 (UTC) Received: by mail-pf1-f182.google.com with SMTP id d2e1a72fcca58-668709767b1so2411875b3a.2 for ; Sat, 15 Jul 2023 20:12:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1689477138; x=1692069138; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=bWn13c9f1M/8viQCOKsJa8B4NPDT5f2J9jrudPMX6BM=; b=Dk7tg4NeoDHBveKLdPLYXeFSYRUAqoyXh9PvGDt/8cZJdUm1Si7DX4mb+o6JiARy68 4K2ynaKg8vaQYV5wG2a6agRCAKcFMdG76yFQFV17wjzbzrQPbruW4k+xJ8RH73CowEaV N2aOcj98U69XMhEL698Cq3aIGyjpYjKZu3a2q7nqeEkf7qvY4hgimF5XoQ4weJYgv8LQ O4x2LbQ7gUMJ3GnOuAMTRNbIu6yMVNCOPO88aYWSrCkzf1RMITs0eGFgb1LaIGh3//LB 6lKjskf7ksyxNz6PYO8Mbipp6iazbUJ5zriIA559em64Hu5lmgldZI4CR+0UsEJ2Cxf0 jWzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689477138; x=1692069138; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=bWn13c9f1M/8viQCOKsJa8B4NPDT5f2J9jrudPMX6BM=; b=Mraot/3+f6bPM67lV9rIXrf+fbHJkE48MzITKWC3w4bJP6mJbjW71PsrrdS2qGAhFt yDtdpMbzdkmn4qAFJ9kCZvdXsb8pFaWBzTBFu4VjAh61tE8C1IhSCu5GtTzh+8Fkw2oN 4ah4IYxE9YZGgVKEFe0tsn+bKWa6BTxwqctsgQZeuuQ6GD5mbiYjPtXdQ+Zx821IH+Q/ /rPiA59Sc+6AwN8CWO8ryuh4aBV8nJPZP8e3DOCFnpPPyEtn6MAS06OO9s33mlF0r1lv PgBF2wj68oQ9lhAMU84vgVtrc2+aLBqdq7yw6WHfI3SoCP7bAQaXYRxA2qVIoPO003Y2 cicQ== X-Gm-Message-State: ABy/qLb1jR2BZCGF5zxgNJCYvabFRTPVRlO+QFiV/wIZ3Uf7beTGOWlL 47tlxLFj1hsAhO1ZsE1VOR4= X-Google-Smtp-Source: APBJJlFz60QuiBe9CzCnF7c0Fnkq2vo0ZvCE1iu7Z3EawbryxkJd5Kp3ffPDKIXOjhB2mphUJJ2Z3g== X-Received: by 2002:a17:903:2606:b0:1b3:f5c3:7682 with SMTP id jd6-20020a170903260600b001b3f5c37682mr6650815plb.68.1689477138561; Sat, 15 Jul 2023 20:12:18 -0700 (PDT) Received: from debian.me ([103.131.18.64]) by smtp.gmail.com with ESMTPSA id p8-20020a1709026b8800b001b8649e52f8sm10074521plk.254.2023.07.15.20.12.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Jul 2023 20:12:17 -0700 (PDT) Received: by debian.me (Postfix, from userid 1000) id B7ABF80F26C1; Sun, 16 Jul 2023 10:12:13 +0700 (WIB) Date: Sun, 16 Jul 2023 10:12:13 +0700 From: Bagas Sanjaya To: Mikhail Gavrilov , Linux Memory Management List , Linux Kernel Mailing List , hughd@google.com Cc: Linux Regressions Subject: Re: [bug/bisected] I see "mm/pgtable-generic.c:53: bad pmd (____ptrval____)(8000000100077061)" every boot time Message-ID: References: Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="xM6pUvZ1vpmzR5ZF" Content-Disposition: inline In-Reply-To: --xM6pUvZ1vpmzR5ZF Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jul 15, 2023 at 02:24:59PM +0500, Mikhail Gavrilov wrote: > Hi, > It's ok that I see "mm/pgtable-generic.c:53: bad pmd > (____ptrval____)(8000000100077061)" every boot time? > Unfortunately bisect couldn't say which of commits > # possible first bad commit: > [be872f83bf571f4f9a0ac25e2c9c36e905a36619] mm/pagewalk: > walk_pte_range() allow for pte_offset_map() > # possible first bad commit: > [7780d04046a2288ab85d88bedacc60fa4fad9971] mm/pagewalkers: > ACTION_AGAIN if pte_offset_map_lock() fails > # possible first bad commit: > [2798bbe75b9c2752b46d292e5c2a49f49da36418] mm/page_vma_mapped: > pte_offset_map_nolock() not pte_lockptr() > # possible first bad commit: > [90f43b0a13cddb09e2686f4d976751c0a9b8b197] mm/page_vma_mapped: > reformat map_pte() with less indentation > # possible first bad commit: > [45fe85e9811ede2d65b21724cae50d6a0563e452] mm/page_vma_mapped: delete > bogosity in page_vma_mapped_walk() > # possible first bad commit: > [65747aaf42b7db6acb8e57a2b8e9959928f404dd] mm/filemap: allow > pte_offset_map_lock() to fail > # possible first bad commit: > [0d940a9b270b9220dcff74d8e9123c9788365751] mm/pgtable: allow > pte_offset_map[_lock]() to fail > definitely first bad because my machine on which I am was doing > bisection is unbootable on these commits. > I hope Hugh Dickins can figure out what's going on here. He is the > author of these commits. >=20 > All mine machines are based on the AMD platform two 7950X and one 5900HX. >=20 > It seems that this message is harmless for the system in any way, but > I can't judge it is a bug or not. > >From the user side it looks like regression because on commit > 46c475bd676bb05077c8a38b37f175552f035406 this message was absent. What are you doing on your system that leads into this regression? Anyway, I'm adding this regression to be tracked with regzbot: #regzbot ^introduced: 0d940a9b270b92 #regzbot title: undescribed regression due to allowing failing pte_offset_m= ap[_lock]() Thanks. --=20 An old man doll... just what I always wanted! - Clara --xM6pUvZ1vpmzR5ZF Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQSSYQ6Cy7oyFNCHrUH2uYlJVVFOowUCZLNgAgAKCRD2uYlJVVFO o5uJAP9iv4ViJIKdFG+k40g7iok8mka4Z3j6kKH8KU5kHl4aEAEAqhMxhrZhAUHR jW1OtUnuCuHNrm4RxJPOGZpWMi8yZwQ= =JI3s -----END PGP SIGNATURE----- --xM6pUvZ1vpmzR5ZF--