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Thu, 30 Jan 2020 16:20:48 -0500 (EST) Subject: Re: With Linux 5.5: Filesystem full while still 90 GiB free To: Martin Steigerwald References: <112911984.cFFYNXyRg4@merkaba> <21104414.nfYVoVUMY0@merkaba> <1887603.ctEADUaVB5@merkaba> From: Remi Gauvin Openpgp: url=http://www.georgianit.com/pgp/Remi%20Gauvin%20remi%40georgianit.com%20(0xEF539FF247456A6D)%20pub.asc Autocrypt: addr=remi@georgianit.com; prefer-encrypt=mutual; keydata= mQENBFogjcYBCADvI0pxdYyVkEUAIzT6HwYnZ5CAy2czT87Si5mqk4wL4Ulupwfv9TLzaj3R CUgHPNpFsp1n/nKKyOq1ZmE6w5YKx4I8/o9tRl+vjnJr2otfS7XizBaVV7UwziODikOimmT+ sGNfYGcjdJ+CC567g9aAECbvnyxNlncTyUPUdmazOKhmzB4IvG8+M2u+C4c9nVkX2ucf3OuF t/qmeRaF8+nlkCMtAdIVh0F7HBYJzvYG3EPiKbGmbOody3OM55113uEzyw39k8WHRhhaKhi6 8QY9nKCPVhRFzk6wUHJa2EKbKxqeFcFzZ1ok7l7vrX3/OBk2dGOAoOJ4UX+ozAtrMqCBABEB AAG0IVJlbWkgR2F1dmluIDxyZW1pQGdlb3JnaWFuaXQuY29tPokBPgQTAQIAKAUCWiCNxgIb IwUJCWYBgAYLCQgHAwIGFQgCCQoLBBYCAwECHgECF4AACgkQ71Of8kdFam2V1Qf9Fs6LSx1i OoVgOzjWwiI06vJrZznjmtbJkcm/Of5onITZnB4h+tbqEyaMYYsEIk1r4oFMfKB7SDpQbADj 9CI2EbpygwZa24Oqv4gWEzb4c7mSJuLKTnrhmwCOtdeDQXO/uu6BZPkazDAaKHUM6XqNEVvt WHBaGioaV4dGxzjXALQDpLc4vDreSl9nwlTorwJR9t6u5BlDcdh3VOuYlgXjI4pCk+cihgtY k3KZo/El1fWFYmtSTq7m/JPpKZyb77cbzf2AbkxJuLgg9o0iVAg81LjElznI0R5UbYrJcJeh Jo4rvXKFYQ1qFwno1jlSXejsFA5F3FQzJe1JUAu2HlYqRrkBDQRaII3GAQgAo0Y6FX84QsDp R8kFEqMhpkjeVQpbwYhqBgIFJT5cBMQpZsHmnOgpYU0Jo8P3owHUFu569g6j4+wSubbh2+bt WL0QoFZcng0a2/j3qH98g9lAn8ZgohxavmwYINt7b+LEeDoBvq0s/0ZeXx47MOmbjROq8L/g QOYbIWoJLO2emyxmVo1Fg00FKkbuCEgJPW8U/7VX4EFYaIhPQv/K3mpnyWXIq5lviiMCHzxE jzBh/35DTLwymDdmtzWgcu1rzZ6j2s+4bTxE8mYXd4l2Xonn7v448gwvQmZJ8EPplO/pWe9F oISyiNxZnQNCVEO9lManKPFphfVHqJ1WEtYMiLxTkQARAQABiQElBBgBAgAPBQJaII3GAhsM BQkJZgGAAAoJEO9Tn/JHRWptnn0H+gOtkumwlKcad2PqLFXCt2SzVJm5rHuYZhPPq4GCdMbz XwuCEPXDoECFVXeiXngJmrL8+tLxvUhxUMdXtyYSPusnmFgj/EnCjQdFMLdvgvXI/wF5qj0/ r6NKJWtx3/+OSLW0E9J/gLfimIc3OF49E3S1c35Wj+4Okx9Tpwor7Tw8KwBVbdZA6TyQF08N phFkhgnTK6gl2XqIHaoxPKhI9pKU5oPkg2eI27OICZrpTCppaSh3SGUp0EHPkZuhVfIxg4vF nato30VZr+RMHtPtx813VZ/kzj+2pC/DrwZOtqFeaqJfCi6JSik3vX9BQd9GL4mxytQBZKXz SY9JJa155sI= Cc: linux-btrfs Message-ID: <4b18e328-72fc-8167-d140-97c898c47e6a@georgianit.com> Date: Thu, 30 Jan 2020 16:20:47 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <1887603.ctEADUaVB5@merkaba> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="DIwQsDUyuVUnGtzeufPaDonOPhV9LnN7W" 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) --DIwQsDUyuVUnGtzeufPaDonOPhV9LnN7W Content-Type: multipart/mixed; boundary="OshYGbl0FUYN2FEftT9WorLjB7a5rrrLQ"; protected-headers="v1" From: Remi Gauvin To: Martin Steigerwald Cc: linux-btrfs Message-ID: <4b18e328-72fc-8167-d140-97c898c47e6a@georgianit.com> Subject: Re: With Linux 5.5: Filesystem full while still 90 GiB free References: <112911984.cFFYNXyRg4@merkaba> <21104414.nfYVoVUMY0@merkaba> <1887603.ctEADUaVB5@merkaba> In-Reply-To: <1887603.ctEADUaVB5@merkaba> --OshYGbl0FUYN2FEftT9WorLjB7a5rrrLQ Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2020-01-30 4:10 p.m., Martin Steigerwald wrote: >=20 > I am done with re-balancing experiments. >=20 It should be pretty easy to fix.. use the metadata_ratio=3D1 mount option= , then write enough to force the allocation of more data space,, In your earlier attempt, you wrote 500MB, but from your btrfs filesystem usage, you had over 1GB of allocated but unused space. If you wrote and deleted, say, 20GB of zeroes, that should force the allocation of metatada space to get you past the global reserve size that is causing this bug,, (Assuming this bug is even impacting you. I was unclear from your messages if you are seeing any ill effects besides the misreporting in df.) Note: Make sure you don't have anything taking automatic snapshots during the 20GB write/delete. I would create a new subvolume for it to avoid that. --OshYGbl0FUYN2FEftT9WorLjB7a5rrrLQ-- --DIwQsDUyuVUnGtzeufPaDonOPhV9LnN7W Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJeM0ivAAoJEO9Tn/JHRWptbCQIAOj7UKqpY+xuFRZk5Z2snP/E D1/hoL+uZx+LEF8/RpFqrWg6XBScocmnKGT7udNnhdiV5tDofMPQcOHKk0sPk/Lb HIjfwlvqWqMUAk/u5mfN8h2C2ZhhIP2Ow4KoMnhfWzMUsjcXGTlox0tdgA7DJvOQ Uy+Zr/sTki/SnvHO/3yMWM7VTRlOQVUWtM0mzcYujSB7tD+4u/TDRPCc+tqHpATK SDYIHhPWtHnzPEUrFqllAYxhE7kkdvbGLiJRDWKZMoGZq7ehUo0M/GW4nkldXXKN cymkk/gX2hEqgK6UJRQu7ocGIANEckVa/U5yyh7vk4+EBZZjzTnrgvhp+JL8QBk= =pdDG -----END PGP SIGNATURE----- --DIwQsDUyuVUnGtzeufPaDonOPhV9LnN7W--