Re: Regression: kernel 4.0.0-rc1 - soft lockups

2015-03-03 Thread Liu Bo
On Tue, Mar 03, 2015 at 08:31:10AM +0100, Marcel Ritter wrote: Hi, yes it is reproducible. Just creating a new btrfs filesystem (14 disks, data/mdata raid6, latest git btrfs-progs) and mounting this filesystems causes the system to hang (I think I once even got it mounted, but it did

Re: Regression: kernel 4.0.0-rc1 - soft lockups

2015-03-03 Thread Marcel Ritter
Hi, just a short update on this topic: I also tried the Ubuntu 4.0.0-rc1 ppa kernel - problems are still there. Luckily kernel 4.0.0-rc2 was released yesterday: I updated my machine to kernel 4.0.0-rc2 and the problems are gone (test script has been running fine for about 12 hours now) Bye,

Regression: kernel 4.0.0-rc1 - soft lockups

2015-03-02 Thread Marcel Ritter
Hi, yesterday I did a kernel update on my btrfs test system (Ubuntu 14.04.2) from custom-build kernel 3.19-rc6 to 4.0.0-rc1. Almost instantly after starting my test script, the system got stuck with soft lockups (the machine was running the very same test for weeks on the old kernel without

Re: Regression: kernel 4.0.0-rc1 - soft lockups

2015-03-02 Thread Liu Bo
On Tue, Mar 03, 2015 at 07:02:01AM +0100, Marcel Ritter wrote: Hi, yesterday I did a kernel update on my btrfs test system (Ubuntu 14.04.2) from custom-build kernel 3.19-rc6 to 4.0.0-rc1. Almost instantly after starting my test script, the system got stuck with soft lockups (the machine

Re: Regression: kernel 4.0.0-rc1 - soft lockups

2015-03-02 Thread Marcel Ritter
Hi, yes it is reproducible. Just creating a new btrfs filesystem (14 disks, data/mdata raid6, latest git btrfs-progs) and mounting this filesystems causes the system to hang (I think I once even got it mounted, but it did hang shortly after when dd started writing to it). I just ran some quick