Discussion:
Luminous/Ubuntu 16.04 kernel recommendation ?
(too old to reply)
Yoann Moulin
2018-02-04 18:00:07 UTC
Permalink
Raw Message
Hello,

What is the best kernel for Luminous on Ubuntu 16.04 ?

Is linux-image-virtual-lts-xenial still the best one ? Or linux-virtual-hwe-16.04 will offer some improvement ?

Thanks,
--
Yoann Moulin
EPFL IC-IT
Kevin Olbrich
2018-02-07 21:28:31 UTC
Permalink
Raw Message
Would be interested as well.

- Kevin
Post by Yoann Moulin
Hello,
What is the best kernel for Luminous on Ubuntu 16.04 ?
Is linux-image-virtual-lts-xenial still the best one ? Or
linux-virtual-hwe-16.04 will offer some improvement ?
Thanks,
--
Yoann Moulin
EPFL IC-IT
_______________________________________________
ceph-users mailing list
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Martin Emrich
2018-02-08 10:20:08 UTC
Permalink
Raw Message
I have a machine here mounting a Ceph RBD from luminous 12.2.2 locally,
running linux-generic-hwe-16.04 (4.13.0-32-generic).

Works fine, except that it does not support the latest features: I had
to disable exclusive-lock,fast-diff,object-map,deep-flatten on the
image. Otherwise it runs well.

Regards,

Martin
Post by Kevin Olbrich
Would be interested as well.
- Kevin
Hello,
What is the best kernel for Luminous on Ubuntu 16.04 ?
Is linux-image-virtual-lts-xenial still the best one ? Or
linux-virtual-hwe-16.04 will offer some improvement ?
Thanks,
--
Yoann Moulin
EPFL IC-IT
_______________________________________________
ceph-users mailing list
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
<http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com>
_______________________________________________
ceph-users mailing list
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Ilya Dryomov
2018-02-08 10:50:55 UTC
Permalink
Raw Message
On Thu, Feb 8, 2018 at 11:20 AM, Martin Emrich
Post by Martin Emrich
I have a machine here mounting a Ceph RBD from luminous 12.2.2 locally,
running linux-generic-hwe-16.04 (4.13.0-32-generic).
Works fine, except that it does not support the latest features: I had to
disable exclusive-lock,fast-diff,object-map,deep-flatten on the image.
Otherwise it runs well.
That kernel should support exclusive-lock. It doesn't hurt to disable
exclusive-lock if you don't need it though.

Thanks,

Ilya
Martin Emrich
2018-02-08 11:49:36 UTC
Permalink
Raw Message
Post by Ilya Dryomov
On Thu, Feb 8, 2018 at 11:20 AM, Martin Emrich
Post by Martin Emrich
I have a machine here mounting a Ceph RBD from luminous 12.2.2 locally,
running linux-generic-hwe-16.04 (4.13.0-32-generic).
Works fine, except that it does not support the latest features: I had to
disable exclusive-lock,fast-diff,object-map,deep-flatten on the image.
Otherwise it runs well.
That kernel should support exclusive-lock. It doesn't hurt to disable
exclusive-lock if you don't need it though.
Thanks, good to know... But indeed I do not need it in this case.

Cheers,

Martin
Kevin Olbrich
2018-02-08 11:54:44 UTC
Permalink
Raw Message
Post by Martin Emrich
I have a machine here mounting a Ceph RBD from luminous 12.2.2 locally,
running linux-generic-hwe-16.04 (4.13.0-32-generic).
Works fine, except that it does not support the latest features: I had to
disable exclusive-lock,fast-diff,object-map,deep-flatten on the image.
Otherwise it runs well.
I always thought that the latest features are built into newer kernels, are
they available on non-HWE 4.4, HWE 4.8 or HWE 4.10?
Also I am researching for the OSD server side.

- Kevin
Ilya Dryomov
2018-02-08 13:18:35 UTC
Permalink
Raw Message
Post by Kevin Olbrich
Post by Martin Emrich
I have a machine here mounting a Ceph RBD from luminous 12.2.2 locally,
running linux-generic-hwe-16.04 (4.13.0-32-generic).
Works fine, except that it does not support the latest features: I had to
disable exclusive-lock,fast-diff,object-map,deep-flatten on the image.
Otherwise it runs well.
I always thought that the latest features are built into newer kernels, are
they available on non-HWE 4.4, HWE 4.8 or HWE 4.10?
No, some of these features haven't made it to the kernel client yet.
Post by Kevin Olbrich
Also I am researching for the OSD server side.
For the OSDs, you should be fine with pretty much any kernel supported
by your distro.

Thanks,

Ilya
Steffen Weißgerber
2018-02-09 08:26:36 UTC
Permalink
Raw Message
Hello,
Post by Kevin Olbrich
Post by Martin Emrich
I have a machine here mounting a Ceph RBD from luminous 12.2.2 locally,
running linux-generic-hwe-16.04 (4.13.0-32-generic).
Works fine, except that it does not support the latest features: I had to
disable exclusive-lock,fast-diff,object-map,deep-flatten on the image.
Otherwise it runs well.
I always thought that the latest features are built into newer kernels, are
they available on non-HWE 4.4, HWE 4.8 or HWE 4.10?
Also I am researching for the OSD server side.
You'll find it in the kernel sources with

grep RBD_FEATURE /usr/src/linux/drivers/block/rbd.c
Post by Kevin Olbrich
- Kevin
Regards

Steffen
--
Klinik-Service Neubrandenburg GmbH
Allendestr. 30, 17036 Neubrandenburg
Amtsgericht Neubrandenburg, HRB 2457
Geschaeftsfuehrerin: Gudrun Kappich
Loading...