[Xen-devel] Re : high CPU stolen time after live migrate

Le mardi 03 octobre 2017 à 11:22 +0200, Dario Faggioli a écrit : > What's the version of your guest kernel? 4.9.52, so yes, it seems to be that, I will try to patch and follow this issue. Thanks ! Olivier ___ Xen-devel mailing list Xen-devel@lists.xen

[Xen-devel] Re : Re : Re : task btrfs-transacti:651 blocked for more than 120 seconds

Le vendredi 29 septembre 2017 à 10:20 +0100, Roger Pau Monné a écrit : > On Thu, Sep 28, 2017 at 05:27:54PM +0000, Olivier Bonvalet wrote: > > Le jeudi 28 septembre 2017 à 17:12 +0100, Roger Pau Monné a écrit : > > > > > > Quite likely. With so many PV block devices att

[Xen-devel] high CPU stolen time after live migrate

Hi, with Xen 4.8.2, migrated domains have wrong stats for stolen time. For example : root! laussor:/proc# cat stat cpu 87957976 32463 6483874 361169794 3075806 0 937004 183086986113 0 0 cpu0 2828867 2434 226580 43754152 786651 0 42766 1778722573131 0 0 cpu1 2611496 3545 232529 42364047 594846

[Xen-devel] Re : Re : task btrfs-transacti:651 blocked for more than 120 seconds

Le jeudi 28 septembre 2017 à 17:12 +0100, Roger Pau Monné a écrit : > > Quite likely. With so many PV block devices attached you either have > to limit the number of queues and persistent grants per-device, or > expand the number of grants allowed by Xen. > > Can you try to set the following in t

[Xen-devel] Re : Re : task btrfs-transacti:651 blocked for more than 120 seconds

Le jeudi 28 septembre 2017 à 16:28 +0200, Olivier Bonvalet a écrit : > [ 3263.452023] INFO: task systemd:1 blocked for more than 120 > seconds. > [ 3263.452040] Tainted: GW 4.9-dae-xen #2 > [ 3263.452044] "echo 0 > /proc/sys/kernel/hung_task_timeout_s

[Xen-devel] Re : task btrfs-transacti:651 blocked for more than 120 seconds

Le jeudi 28 septembre 2017 à 12:16 +0200, Olivier Bonvalet a écrit : > It's a Debian Stretch system, running a 4.9.52 Linux kernel (on a Xen > 4.8.2 hypervisor). > With an old 4.1.x Linux kernel, I haven't any problem. Just a precision, this VM have 26 block devices attached.

[Xen-devel] Re : task btrfs-transacti:651 blocked for more than 120 seconds

Le jeudi 28 septembre 2017 à 14:18 +0300, Nikolay Borisov a écrit : > So what this stack trace means is that transaction commit has hung. > And > judging by the called functions (assuming they are correct, though > the ? > aren't very encouraging). Concretely, it means that an io has been > started

[Xen-devel] task btrfs-transacti:651 blocked for more than 120 seconds

Hi ! I have a virtual server (Xen) which very frequently hangs with only this error in logs : [ 1330.144124] INFO: task btrfs-transacti:651 blocked for more than 120 seconds. [ 1330.144141] Not tainted 4.9-dae-xen #2 [ 1330.144146] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables

[Xen-devel] Re : blkdev_issue_discard hung [solved ?]

kernel for Dom0, with last driver version for xen-blkback, and it doesn't have the problem. Good ! Le lundi 25 septembre 2017 à 22:47 +0200, Olivier Bonvalet a écrit : > Hi, > > I have a problem with Xen 4.8.2 (or Linux 4.9.51 as dom0 kernel) : > calls to DISCARD command from the Do

[Xen-devel] blkdev_issue_discard hung

Hi, I have a problem with Xen 4.8.2 (or Linux 4.9.51 as dom0 kernel) : calls to DISCARD command from the DomU frequently hang. I also have the problem with Xen 4.8.1 and Linux 4.9 from Debian 9 (stretch) repositories. Here logs from dom0 : Sep 25 22:32:44 hyp04-sbg kernel: [ 7468.540610] INFO: t