Date: Fri, 30 Apr 2004 16:02:06 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "M. Warner Losh" <imp@bsdimp.com> Cc: freebsd-current@freebsd.org Subject: Re: DEVFS in a chroot? Message-ID: <7432.1083333726@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 30 Apr 2004 07:54:48 MDT." <20040430.075448.70646001.imp@bsdimp.com>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <20040430.075448.70646001.imp@bsdimp.com>, "M. Warner Losh" writes: >In message: <6695.1083331489@critter.freebsd.dk> > "Poul-Henning Kamp" <phk@phk.freebsd.dk> writes: >: In message <20040430.070341.26991317.imp@bsdimp.com>, "M. Warner Losh" writes: >: >In message: <5473.1083327210@critter.freebsd.dk> >: > "Poul-Henning Kamp" <phk@phk.freebsd.dk> writes: >: >: >Should I mount /var/chroot/dev as type devfs? >: >: >: >: Yes: >: >: >: >: mount -t devfs randomargument /var/chroot/dev >: > >: >What if I have hundreds of these chroots? We build our product inside >: >a chroot right now and I'm worried what the overhead of >: >mounting/unmounting this for every build would be... >: >: As far as I recall, our mountlist handling is not optimised for >: hundreds of simultaneous mountpoints: we basically walk the list. >: That said, I belive we only do so during the actual mount/unmount >: operations, so I do not think there is a performance issue as such. > >Would the performance issues be mitigated by mounting/unmounting devfs >all the time? Eg, only mount it while it is actively being used? I think you would actually make it worse that way... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?7432.1083333726>