On Monday 31 May 2010 2:45:25 pm Jeremy Chadwick wrote: > On Mon, May 31, 2010 at 11:25:51AM -0700, Dave Hayes wrote: > > Jeremy Chadwick <free...@jdc.parodius.com> writes: > > > Is the mfsroot file compressed (.gz extension)? Reason I ask is that > > > the OP states he's using RELENG_7... > > > > Yes it is compressed. > > > > > http://jdc.parodius.com/freebsd/pxeboot_serial_install_7.html#step7 > > > > Thanks much for this. I did a simple test, I rebuilt a DVD that wasn't > > booting to use a lower level of compression (gzip -9 to gzip -6) on > > mfsroot without changing anything else. This caused it to boot normally. > > > > I'm not sure it's conclusive evidence, but it certainly looks like a > > weak datapoint supporting this kernel bug being the source of my > > problem. > > > > Is this problem fixed in 8.0 or by a patch? > > With regards to said bug, gzip compression seems to work fine on > RELENG_8, at least in my experiences: > > http://jdc.parodius.com/freebsd/pxeboot_serial_install_8.html > > I'm not sure the level of compression is what triggers the bug though; > I haven't tested all levels (1 through 9). > > CC'ing jhb@ since he last updated PR kern/120127 (which I would say is > still a problem on RELENG_7 :-) ). John, are you aware of any gzip > decompression / mfsroot changes which might explain the problem on > RELENG_7? I haven't done a "thorough" series of tests, but on my > testbed boxes RELENG_8 works fine with a gzip'd mfsroot.
Ok, if you are using a stock mfsroot from a release build, that should work fine. If you have built a custom mfsroot that is larger, then you may need to increase NKPT on i386. In very recent 7 and later you can do this by setting it to a new value in your kernel config. In older versions you can do this by manually adding a #define to set a new value of NKPT in opt_global.h or hacking on the source directly. -- John Baldwin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
