Date: Thu, 12 Jan 2012 19:37:27 -0800 From: Joe Ennis <joe@whiskey7.net> To: freebsd-stable@freebsd.org Subject: Re: GENERIC make buildkernel error / fails - posix_fadvise Message-ID: <20120112193727.4ef16e5a@tsunami.lan> In-Reply-To: <CAGH67wTFy_2JAGOX=VmUx2KRmFcRrv8aaE3H4EkiqcOxmk09Hw@mail.gmail.com> References: <20120111161110.4258969c.rpclark@tds.net> <CAN-pd=cPY=Eg1RintaBx6GAon3FsLm-X0h6yvSBxzq=EZ5ukbg@mail.gmail.com> <20120112200843.2a348d2f.rpclark@tds.net> <4F0F8E6F.8000909@FreeBSD.org> <CAGH67wTFy_2JAGOX=VmUx2KRmFcRrv8aaE3H4EkiqcOxmk09Hw@mail.gmail.com>
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On Thu, 12 Jan 2012 19:11:54 -0800
Garrett Cooper <yanegomi@gmail.com> wrote:
> On Thu, Jan 12, 2012 at 5:52 PM, Doug Barton <dougb@freebsd.org>
> wrote:
> >
> >>> chflags -R noschg /usr/obj/usr
> >>> rm -rf /usr/obj/usr
> >
> > It's much faster to do:
> >
> > /bin/rm -rf ${obj}/* 2> /dev/null || /bin/chflags -R 0 ${obj}/* &&
> > /bin/rm -rf ${obj}/*
>
> +1. And it's faster yet when you can run parallel copies of rm on
> different portions of the directory tree (e.g. xargs, find [..] -exec)
> as rm is O(n).
> Cheers,
> -Garrett
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What I've been doing just before I do a make buildworld/buildkernel
is:
mdmfs -s2g md1 /usr/obj
on a clean /usr/obj . If I need to recompile before a boot, just umount
and recreate.
Provides a little performance boost too.
Regards,
--
joe
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