Re: rcu_sched self-detected stall on CPU

2015-10-06 Thread Rumen Telbizov
[15466.910927] [] ? SyS_access+0x9f/0x1e0 [15466.910930] [] ? entry_SYSCALL_64_fastpath+0x16/0x75 Any ideas what might be happening here ? Anything else I can do in order to add more debugging/value to the investigation? Thank you, Rumen Telbizov On Mon, Oct 5, 2015 at 3:55 PM, Rumen Telbizov

Re: rcu_sched self-detected stall on CPU

2015-10-06 Thread Rumen Telbizov
I do see the stalls and kernel messages all at the same time across all nodes indeed! I'll try to not use the server as a client and see if it makes any difference. If anyone has any other pointers - please let me know. Thank you, Rumen Telbizov On Tue, Oct 6, 2015 at 1:50 PM, Ben Hutchings &l

Re: rcu_sched self-detected stall on CPU

2015-10-06 Thread Rumen Telbizov
Hi Ben, Yes the NFS server is mounting itself as well. I do see this problem occur on all servers though. Should it not? Any further clues? Thank you for looking into this, Rumen Telbizov On Tue, Oct 6, 2015 at 1:11 PM, Ben Hutchings <b...@decadent.org.uk> wrote: > On Tue, 2015-10

Backport facebook IPv6 routing table PMTU exception patch

2016-12-21 Thread Rumen Telbizov
,​ -- Rumen Telbizov Unix Systems Administrator <http://telbizov.com>

Re: Backport facebook IPv6 routing table PMTU exception patch

2016-12-21 Thread Rumen Telbizov
scenario. In short, if Debian maintains the patch all jessie IPv6 users running default kernel will benefit from this going forward. Thank you for your feedback and consideration. Regards, Rumen Telbizov On Wed, Dec 21, 2016 at 1:22 PM, Ozgur Karatas <okara...@member.fsf.org> wrote: &

Re: Backport facebook IPv6 routing table PMTU exception patch

2016-12-22 Thread Rumen Telbizov
will be backported just like for 3.16 for the lifetime of jessie, or 4.8 will be replaced by 4.9 and so on, thus sticking with the next upstream kernel. Regards, On Wed, Dec 21, 2016 at 11:09 PM, Ben Hutchings <b...@decadent.org.uk> wrote: > On Wed, 2016-12-21 at 13:14 -0800, Rumen Telbi

systemd-udevd stuck in D state with SuperMicro X10DRT-PT and 4.9.13/18 kernels

2017-04-13 Thread Rumen Telbizov
://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859856 ​In short​ with those kernels we observe systemd-udevd getting stuck in 'D' state on SuperMicro X10 class of motherboard. ​We appreciate your input. ​Regards,​ -- Rumen Telbizov Unix Systems Administrator <http://telbizov.com>

Debian 10 kernel 4.19.98-1 IO deadlock

2020-04-22 Thread Rumen Telbizov
to give more details if needed - please let me know. Thank you, -- Rumen Telbizov Unix Systems Administrator <http://telbizov.com>