Re: Fedora distribution build times

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On Sun, 16 Jan 2011 10:14:33 +0100
Roberto Ragusa <mail@xxxxxxxxxxxxxxxx> wrote:

> Tomasz Torcz wrote:
> > On Sat, Jan 15, 2011 at 07:38:21AM -0800, John Reiser wrote:
> >>    This is a full rebuild of all >10k packages.  Due to the
> >> RemoveSUID feature in Fedora 15, mock can no longer use tmpfs
> >> buildroots, meaning this run takes 4 days instead of <1.  Progress?
> >>
> >> A slowdown by a factor of 4 is a high price to pay for the impact
> >> of RemoveSUID. I'd rather pay at most 30%, and not a factor of 4.
> > 
> >  That's the extreme corner case, caused by bug in tmpfs (lack
> > of filecaps?).  Upstream kernel bug, I would say.
> 
> Which filesystems support filecaps?

I don't know if there is a list anywhere... all the main ones do: ext*,
btrfs, xfs, etc. 

> Will the RemoveSUID feature reduce the number of filesystem usable in
> F15?

Depends on what you mean by "usable". Usable as filesystems that
contain packaged files?

See also: 

http://lkml.indiana.edu/hypermail/linux/kernel/1101.1/01210.html

Patch submitted for upstream feedback that adds caps to tmpfs. This
should hopefully get into the mainstream/fedora kernels soon. If it
doesn't, we will probibly revert the feature. 

kevin

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