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[2003:d3:c72d:9a00:9265:f4f1:4fa5:f9a3]) by smtp.gmail.com with ESMTPSA id p11sm5462307edu.93.2020.09.09.22.36.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 09 Sep 2020 22:36:39 -0700 (PDT) Subject: Re: backref mismatch / backpointer mismatch To: Qu Wenruo , linux-btrfs@vger.kernel.org References: <0219bbee-9ca3-135a-8a2f-5d616000c1e0@gmail.com> From: Johannes Rohr Autocrypt: addr=jorohr@gmail.com; prefer-encrypt=mutual; keydata= mQENBFT1gLABCADcwcj45ysOenaLb8+pkjeb+6oC5IZQ5rgf42l8tCfU6mwwTyaHI/OE9f1f pClmX+dkEFp9HjFK6e33St+HgcXsmarEpVkGVB1oLwhnECuBngqJLbopXL8QfgVkjaNq2aF9 QfR0W2F8BlNDllnJ8q3MToY3RQ2BSkYvsekCS9zJ+8cFrZohpTa9hvtD2tDdHk48A8GaxA7Q CZm3FSbzXEFuGH4TZ4P407b6prXfU8LidTCrkluuM44LhqTGRXmtuVg6jU9vOrkcz8fflGtq Orziu8O32iiL9HU1Oo2wX/vXq9wANj9PAp+cOknXVAH/MeYSIPqo+0pc6ObZxufYyUehABEB AAG0IEpvaGFubmVzIFJvaHIgPGpvcm9ockBnbWFpbC5jb20+iQFOBBMBCAA4FiEEQGpo2KXp zZlAiCX9BQuNsh71kW8FAliYN80CGwMFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQBQuN sh71kW8GRgf9GKnsiEasxb/0/ngspsDBFCT2GROrA+Qqz7cp14hZVtOkm6nJ7wshAYy+UGfl ovPRi3D3JG/RJvBQHi+rYIBrROOOVbj704AC5oFCUwsFs6pKcnwlRaodIo9u4ZgiYOkNln12 UJxuPL1v7J1ccgypP3ufFZaH9gJGssZtajyQkeCRCKNbBPIbXMSnsTWBqyB4AulnyAwVFJAc 4yga8FaJtiDV334tt2TBNw80yqtDczjbjq/tJkcR5VlzVLpPXpbJ8FCL7K945MmN2fpWgWvj WtqEfnsSW/y1x7OfDWQ8CG1szKc6HVsqkRNQwksJapIdresC2dNe7oT+m9bn0+RWIrkBDQRU 9YCwAQgAu86uORuwnEMOhc1poBRsvWns7G0eMd0vdSaiSAPaP8pQrgTC16wBXJXPxPIhIzfs PnGvHgv21BhGcBRcQ7Ybh56dXnWBuKMNnIz2PcMEdHfjd/NG0SDRZdEl/Eztk143kXxsjMTo 10sGHPVJOFIVG1L9K2XcZ/M4SvvR5rSYW2obRbCtT3EkNAcyynA/xKtOhsAFkCVjO4twytQv Og9rpn02bBrjZqaTCHPzVl7ZpjVD6oykY8uJrgKc4EGMouH3WitZppkWSqaB1hgJp78CjwkB 12mT+YcIoM6xzAIklBzKK4qaV1elHhd5clhbDuSpGor/KJcyolx5hbMFwrT+jQARAQABiQEf BBgBAgAJBQJU9YCwAhsMAAoJEAULjbIe9ZFvhS8H/3hMmBhanQeDumAndrJI14228G9QUSW2 SO92Uzlek/mQwRbIg/+nkLn2aC4RkEYqox+AuQA7TqX+OS7JjFVS9vtsn2ZM+kgvMpzUaKO5 aCjqiyXB4Q3pvg2t46SeuiV1Y3cbyhAH6gzCOei/IMguhYIqNAsf7bf2drN5e1uMHpzJHrBK KugcR5bTfAVQzwnOMPQtPH4mRe7cALp04t4rxSZUiC9Xw9s38oK+Ewk/TtjBEFg4VTDMHdcE B65jlCq15bGxaOSwZbDzx/exLNq41HM3xygY7XFgAdyE6FJLvUc5ehqTjiwsIx3BioRMOTzd 5n0x4xeJ5v4w63j4mSxbZu4= Message-ID: <895dd934-8159-e14b-de7a-10fba881d96f@gmail.com> Date: Thu, 10 Sep 2020 07:36:38 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="ECUhmYzSmMi6uimsoz3EQnAs5CuTSNlLr" Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --ECUhmYzSmMi6uimsoz3EQnAs5CuTSNlLr Content-Type: multipart/mixed; boundary="iPYZRDi8JyoLqkO0mLTeTnb7XZCwosvXE" --iPYZRDi8JyoLqkO0mLTeTnb7XZCwosvXE Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: en-US Am 10.09.20 um 04:16 schrieb Qu Wenruo: > > On 2020/9/9 =E4=B8=8B=E5=8D=8810:51, Johannes Rohr wrote: > What about `btrfs check --mode=3Dlowmem` result? Too late already. After getting the green light in #btrfs, I ran the --repair and it fixed the issue. > > If your btrfs-progs is not uptodate, it may be a false alert. The reason why I did the offline check in the first place was that there were issues, namely, that btrfs balance start -musage=3D70 / resulted in = a segfault and also my attempts to remove a faulty sdd from the RAID reproducibly led to a kernel oops and a hung filesystem. I had asked about this two times on the list [1] also reported the issue to the kernel bugzilla [2]. Also,=C2=A0 upgraded btrfs-progs to 5.7 before runni= ng the test. Fortunately --repair has fixed these issues. Cheers, Johannes [1] https://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg88916.htm= l [2] , https://bugzilla.kernel.org/show_bug.cgi?id=3D209143 > > Thanks, > Qu >> Thanks so much in advance for your advice, >> >> Johannes >> >> >> --iPYZRDi8JyoLqkO0mLTeTnb7XZCwosvXE-- --ECUhmYzSmMi6uimsoz3EQnAs5CuTSNlLr Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEQGpo2KXpzZlAiCX9BQuNsh71kW8FAl9Zu2YACgkQBQuNsh71 kW/wKgf/X8JBR1O3i+2M1IGwbVzh9SYhm23vVY3iWjvDBRpM/Zfu3qhI9xubu36O YiwZvfMOhQLjY4Lfvhy/tH8C7uuRbWMe7aroDOlIAvNPhePihPR/Mpl0UF7Fcbd9 nfriWUkesooKfsOsworIqa/84Gp1oSyaoI4/lHnplL+HAFIfGPsjX7kOgekvwDaN AnrVqWUH4yc8zGioaWoxP5i3q/RRNQ49t9O7R34WHEouP5QCuuGkzpwvYRXzW20h sad6u1bbzwUTF9o7wS63/akGkWZMdwcFHLCv5YsUz+02Ar1hCH/Jb4YMMFarXPTz jOoHRSoqRhMioXckbTH60ePUbqoZUw== =Bl65 -----END PGP SIGNATURE----- --ECUhmYzSmMi6uimsoz3EQnAs5CuTSNlLr--