From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net ([212.227.17.20]:63879 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751252AbeAOBfC (ORCPT ); Sun, 14 Jan 2018 20:35:02 -0500 Subject: Re: Hanging after frequent use of systemd-nspawn --ephemeral To: Johannes Ernst , linux-btrfs@vger.kernel.org References: <6B7B9360-41EA-4190-8C7D-9E001D186B23@gmail.com> <8c9933e1-f694-a513-83ca-33fcb503b7e8@gmx.com> From: Qu Wenruo Message-ID: <618575b8-419e-3d09-add0-e42d2c0bb7b2@gmx.com> Date: Mon, 15 Jan 2018 09:34:56 +0800 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="16kFDBM25L8ueRO9Sz1KIlAE4riNAlpoy" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --16kFDBM25L8ueRO9Sz1KIlAE4riNAlpoy Content-Type: multipart/mixed; boundary="mOQjLeJF6ZIfn2oeb7aIAz5mjqG21GfXn"; protected-headers="v1" From: Qu Wenruo To: Johannes Ernst , linux-btrfs@vger.kernel.org Message-ID: <618575b8-419e-3d09-add0-e42d2c0bb7b2@gmx.com> Subject: Re: Hanging after frequent use of systemd-nspawn --ephemeral References: <6B7B9360-41EA-4190-8C7D-9E001D186B23@gmail.com> <8c9933e1-f694-a513-83ca-33fcb503b7e8@gmx.com> In-Reply-To: --mOQjLeJF6ZIfn2oeb7aIAz5mjqG21GfXn Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2018=E5=B9=B401=E6=9C=8815=E6=97=A5 08:58, Johannes Ernst wrote: >>> INFO: task systemd-journal:20876 blocked for more than 120 seconds. >>> [ 5037.962603] Tainted: G C O 4.14.9-1-ARCH #1 >>> [ 5037.962609] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" dis= ables this message. >>> [ 5037.962616] systemd-journal D 0 20876 20860 0x00000100 >>> [ 5037.962622] Call Trace: >>> [ 5037.962635] ? __schedule+0x290/0x890 >>> [ 5037.962640] ? __slab_free+0x14e/0x300 >>> [ 5037.962645] ? _copy_to_iter+0x8f/0x3d0 >>> [ 5037.962651] schedule+0x2f/0x90 >>> [ 5037.962704] btrfs_tree_read_lock+0xb6/0x100 [btrfs] >> >> Still some tree write is blocking all incoming read. >> >> BTW, did your tests include any send and relocation operations? >> >> IIRC there is a bug that makes send and relocation (I'm not sure thoug= h) >> will cause similar problem. >=20 > No. I=E2=80=99m doing nothing btrfs-specific at all, it=E2=80=99s just = whatever systemd-nspawn =E2=80=94ephemeral does. So, only systemd-nspwan --ephemeral, and nothing else at all? Even nothing happened inside the container? Thanks, Qu >=20 > Cheers, >=20 >=20 >=20 > Johannes.-- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >=20 --mOQjLeJF6ZIfn2oeb7aIAz5mjqG21GfXn-- --16kFDBM25L8ueRO9Sz1KIlAE4riNAlpoy Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQFLBAEBCAA1FiEELd9y5aWlW6idqkLhwj2R86El/qgFAlpcBUAXHHF1d2VucnVv LmJ0cmZzQGdteC5jb20ACgkQwj2R86El/qjX/Qf+KHc7dkZOKm6ZOYfZfWomVlOT sfYfMml7Ydb5TVYXrFKkQxt/mEYuRMy3TzQNs0kKVJyMToPcXwKRAtfLcd15k2u2 SRFVCjtCdNKrufQruqf/ouHSs48tq+nAejvWBDnqfNl3c/AXUc7f81kKUocT4WiY /kx9so9oHetABJFm+Q9k3j/2CQnncid5+Zvh2b9pB3HNZ20Bh7CW6LaaBnDa3SVF 2uVhp9UEuJw0Wsis5/p39YLpDdA8ZBEBVGf5zuskz0Dic/X1OrE59/ibv9/fzaMx uK0+a5lzCKFlyOZQT+OZsNhtohUAm4mwBhDq83IsZ8Udk4KmkReIBWVZAvPG3w== =uO59 -----END PGP SIGNATURE----- --16kFDBM25L8ueRO9Sz1KIlAE4riNAlpoy--