Kernel prepatch 4.0-rc7

Posted Apr 8, 2015 23:09 UTC (Wed) by kloczek (guest, #6391)
In reply to: Kernel prepatch 4.0-rc7 by flussence
Parent article: Kernel prepatch 4.0-rc7

> Linux isn't trying to chase dead businesses and no amount of astroturfing will resurrect them.

Really?
So why so many man/hours have been spent on developing KTrace, LLT, LTTng, SystemTap an now perf?
Why people started working on btrfs trying to mimic some ZFS abilities?
What about containerization which trying to mimic Solaris zones?

I'm betting that probably in next year or two some Linux developers will discover something which will be similar to kernel zones.

Whole network layer redesign done in Sol10 is delivered on Linux in pieces making everything more or less similar to pile of yeast.

Kernel prepatch 4.0-rc7

Posted Apr 8, 2015 23:28 UTC (Wed) by Cyberax (✭ supporter ✭, #52523) [Link] (2 responses)

> So why so many man/hours have been spent on developing KTrace, LLT, LTTng, SystemTap an now perf?
Because of a recognized need to get some kind of tracing/sampling solution?

> Why people started working on btrfs trying to mimic some ZFS abilities?
Because people realized that Linux needs a good modern FS? You might also note that BTRFS design is significantly better.

> What about containerization which trying to mimic Solaris zones?
What about Solaris zones that mimic IBM zOS partitions?

Virtualization has a loooooong history, it's far older than SunOS itself.

Kernel prepatch 4.0-rc7

Posted Apr 9, 2015 0:27 UTC (Thu) by kloczek (guest, #6391) [Link] (1 responses)

> Because of a recognized need to get some kind of tracing/sampling solution?

Really? How it is possible that something like DTrace is needed on Linux?

BTW: seems at the end of this year Oracle will offer Oracle Linux with fully integrated DTrace in @base KickStart profile.
Interesting what RedHat will tell on this? :)

> Because of a recognized need to get some kind of tracing/sampling solution?

Really better?
As long as btrfs will not be redesign to use free lists instead allocation structures it will be not possible to be enough close to ZFS.
Try to read https://rudd-o.com/linux-and-free-software/ways-in-which-...

> What about Solaris zones that mimic IBM zOS partitions?

IBM zOS partitions (LPARs) is more similar to LDOMs on T and M USparc hardware and has nothing to do with zones.
LPARs need hardware support. Solaris kernel zones can work with completely without HW support (in last few months has been introduced kernel zones visualization using storage controllers hardware visualization).
BTW: when Linux ill be able to such things?

BTW: with LDOMs you can partition CPU cache (something which is not possible to have on Intel HW .. so far)

> Virtualization has a loooooong history, it's far older than SunOS itself.

Of course .. but LDOMs and LPARs bits are not about visualization but more about partitioning.
Zones as well are not about visualization but more about separation and limiting privileges .. and partitioning modern quite power full HW.

Kernel prepatch 4.0-rc7

Posted Apr 9, 2015 1:35 UTC (Thu) by kloczek (guest, #6391) [Link]

Ehhh I must apologize .. it is to late and I'm doing to many typos per sentence :->
Good night :-)