Namespaces in operation, part 5: User namespaces

Posted Feb 27, 2013 22:34 UTC (Wed) by mabshoff (guest, #86444)
In reply to: Namespaces in operation, part 5: User namespaces by SEJeff
Parent article: Namespaces in operation, part 5: User namespaces

Well, I am not quite sure where the 1 MB patch figure comes from, but all the RHEL 6.x based patches weigh in at 27 MB unpacked. Note that this is 2.6.32 vanilla -> RHEL 6.x+ovz, so I do assume that the vast majority of that diff is the RHEL 6.x changes. Either way, as you mentioned a massive amount of code from the people working for Parallels has been merged, so I would be curious what the RHEL 7.0 diff will look like. I guess we will know in a couple months.

Cheers,

Michael

Namespaces in operation, part 5: User namespaces

Posted Feb 28, 2013 4:25 UTC (Thu) by SEJeff (guest, #51588) [Link] (1 responses)

From a quick google, I found this:
http://openvz.org/Kernel_build#Rebuilding_kernel_from_sou...

[jeff@omniscience tmp]$ wget -q http://download.openvz.org/kernel/branches/2.6.18/028stab...
[jeff@omniscience tmp]$ du -hs patch-ovz028stab056.1-combined.gz
1.2M patch-ovz028stab056.1-combined.gz
[jeff@omniscience tmp]$ gzip -d patch-ovz028stab056.1-combined.gz
[jeff@omniscience tmp]$ du -hs patch-ovz028stab056.1-combined
4.6M patch-ovz028stab056.1-combined

I did the same thing about a year ago and the results were the same. So I still stand by my previous comment. Around a megabyte :)

Namespaces in operation, part 5: User namespaces

Posted Feb 28, 2013 14:33 UTC (Thu) by mabshoff (guest, #86444) [Link]

> From a quick google, I found this: [SNIP]

Yeah, that was the first hit I got, too, but I discarded it for the reason listed below.

> So I still stand by my previous comment. Around a megabyte :)

Well, that specific patch is for a RHEL 5 based kernel, i.e. on top of their version of 2.6.18. The RHEL 6 based 2.6.32 kernel patch weights in at currently 1.3 MB (see [1]). And that patch dates from March 4th 2011, so I would hardly call it current :p.

Anyway, with ploop and some of their other bits being out of mainline for now their patch is a little like the RT patch set: growing some time and shrinking some other time, but as patches move into mainline from it new patches for new functionality get added on top. At least after many years of living mostly out of mainline their efforts like CRIU have shown that you can merge it into mainline assuming all interested parties collaborate, and that is a really positive development imho.

Cheers,

Michael

[1] http://download.openvz.org/kernel/branches/2.6.32/2.6.32-...