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To: freebsd-hackers@freebsd.org
Date: Sat, 30 Jul 2005 20:22:59 +0800

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> 在 2005-07-30六的 12:00 +0000，freebsd-hackers-request@freebsd.org写
道：
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> Today's Topics:
>
> 1. Re: booting gbde-encrypted filesystem (Alexander Leidinger)
> 2. swap reservation accounting (Kostik Belousov)
> 3. Re: [RFC] Add usr/ports to BSD.usr.mtree (Joerg Sonnenberger)
> 4. Re: [RFC] Add usr/ports to BSD.usr.mtree (Xin LI)
> 5. mfs/mdconfig under RELENG_5: malloc vs swap-backed
> (Dmitry Morozovsky)
> 6. Re: mfs/mdconfig under RELENG_5: malloc vs swap-backed
> (Bernd Walter)
> 电子邮件 附件
> 在 2005-07-30六的 12:00 +0000，freebsd-hackers-request@freebsd.org写
> 道：
> > Pawel Jakub Dawidek <pjd@freebsd.org> wrote:
> >
> > > This is not not possible with current GBDE.
> > > I've patches which allows this here:
> > >
> > > http://people.freebsd.org/~pjd/patches/gbde.patch
> >
> > I fail to see how this allows an encryted root-FS, it doesn't add gbde
> > support to boot0(ext) or to the loader. It needs access to an unencrypted
> > kernel. I don't think this is what Ronnel had in mind (overlooking the fact
> > that his suggestion to save the passphrase in the loader is insecure).
> >
> > Bye,
> > Alexander.
> >
> 电子邮件 附件
> 在 2005-07-30六的 12:00 +0000，freebsd-hackers-request@freebsd.org写
> 道：
> > Hello everyone,
> >
> > I developed the patch for 7-CURRENT (also should apply cleanly to 6)
> > that implements swap reservation accounting and allows to cap the
> > allocation of anonymous memory to the available swap. Effectively,
> > this allows to optionally turn off overcommit feature of the VM.
> >
> > Besides this, per-user swap reservation limits could be
> > enforced. Corresponding capability is added to the login.conf database.
> >
> > For some description of the implementation, TODO list and patch
> > itself, please see http://kostikbel.narod.ru
> >
> > This is my first touch of the FreeBSD code, you valuable comments and
> > reviews would be greatly appreciated.
> >
> > Best regards,
> > Kostik Belousov
> >
> >
> 电子邮件 附件
> 在 2005-07-30六的 12:00 +0000，freebsd-hackers-request@freebsd.org写
> 道：
> > On Fri, Jul 29, 2005 at 12:24:44PM +0800, Xin LI wrote:
> > > My points to have /usr/ports in the mtree is for convience that users
> > > creating a jail that is intended to mount the ports tree from the host
> > > system, without having to create their own in every instances. What
> > > do you think about this?
> >
> > My point of view is that it blurs the distinction between base system
> > and local extensions. It surely is convient, but I often scratch my
> > head when I find empty directories on my system. Don't you start to
> > wonder what those directories exist for?
> >
> > Back to the given example of mounting ports into multiple jails,
> > wouldn't you normally have the ports tree only in one jail and use that
> > for all building? The dinoex scripts come to my mind.
> >
> > Joerg
> >
> 电子邮件 附件
> 在 2005-07-30六的 12:00 +0000，freebsd-hackers-request@freebsd.org写
> 道：
> > Hi, Joerg,
> >
> > On Fri, Jul 29, 2005 at 04:43:49PM +0200, Joerg Sonnenberger wrote:
> > > On Fri, Jul 29, 2005 at 12:24:44PM +0800, Xin LI wrote:
> > > > My points to have /usr/ports in the mtree is for convience that users
> > > > creating a jail that is intended to mount the ports tree from the host
> > > > system, without having to create their own in every instances. What
> > > > do you think about this?
> > >
> > > My point of view is that it blurs the distinction between base system
> > > and local extensions. It surely is convient, but I often scratch my
> > > head when I find empty directories on my system. Don't you start to
> > > wonder what those directories exist for?
> >
> > I think I won't if the directory is a well-known one... But I buy
> > your "blur the distinction between base system and local extension" :-)
> >
> > > Back to the given example of mounting ports into multiple jails,
> > > wouldn't you normally have the ports tree only in one jail and use that
> > > for all building? The dinoex scripts come to my mind.
> >
> > This seems to be true only when the jail is provided for one single
> > administrator. For a virtual hosting environment, you will want to
> > run different OS versions inside jail (the development hosting box
> > runs FreeBSD 6.0, 5.4, 5.3, 4.11 and 4.8 inside different jails),
> > and just let the users to choose which application they want. Of
> > course this needs some tricks like WRKDIRPREFIX tweaking
> > inside every jails, and FETCH_CMD to point a hook that fetches
> > all distfiles on behalf of the user, with all read-only ports tree.
> >
> > I will think about other solutions of the usr/ports handling, then.
> > Thanks for the input!
> >
> > Cheers,
> 电子邮件 附件
> 在 2005-07-30六的 12:00 +0000，freebsd-hackers-request@freebsd.org写
> 道：
> > Dear colleagues,
> >
> > can anyone please point me why mdconfig method for tmpmfs
> > is malloc-backed instead of swap-backed, and it is hardcoded into rc.subr?
> >
> > Are swap-backed file systems so inefficient? If no, why not move -M to
> > /etc/defaultc/rc.conf so admin can override this behaviour?
> >
> > Sincerely,
> > D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
> > ------------------------------------------------------------------------
> > *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
> > ------------------------------------------------------------------------
> >
> 电子邮件 附件
> 在 2005-07-30六的 12:00 +0000，freebsd-hackers-request@freebsd.org写
> 道：
> > On Fri, Jul 29, 2005 at 09:41:24PM +0400, Dmitry Morozovsky wrote:
> > > Dear colleagues,
> > >
> > > can anyone please point me why mdconfig method for tmpmfs
> > > is malloc-backed instead of swap-backed, and it is hardcoded into rc.subr?
> > >
> > > Are swap-backed file systems so inefficient? If no, why not move -M to
> > > /etc/defaultc/rc.conf so admin can override this behaviour?
> >
> > Diskless systems may not have swap - the default is required as is.
> > Don't know about beeing hardcoded.
> >
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-- 
Wang Jun@ Atmos. Dep. of NJU. China. 
GNU is Not Unix, BSD is Powerful,
Ada is Beautiful, Nju is Graceful.
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• Previous message: Bernd Walter: "Re: mfs/mdconfig under RELENG_5: malloc vs swap-backed"
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