On Tue Nov 9 10, John Baldwin wrote: > On Tuesday, November 09, 2010 6:46:12 am Alexander Best wrote: > > hi there, > > > > i posted this message on freebsd-questions@, but nobody could help me with > > it. > > to me this looks like a bug, so i assume posting it again here on > > freebsd-current@ might be better. > > > > please keep in mind that the issue here is not the fact that the second > > attempt > > to unload sound.ko/netgraph.ko fails. it *should* fail, because both modules > > have dependencies. however it should fail with the first attempt. right now > > kldunloadf() returns zero, whereas it should actually return EBUSY (just > > like > > the second attempt). > > > > i've attached two kdump outputs: one for the first 'kldunload' attempt and > > one > > for the second. as you can see the problem is that for some reason > > kldunloadf() > > returns zero, although it couldn't unload the module. > > Did you get an error message in dmesg? If you have manually loaded > netgraph.ko (via netgraph_load="YES" in loader.conf or an explicit kldload) > and then loaded other modules that depend on it (such as ng_foo.ko) then this > is expected behavior. What your kldunload has done is to remove the manual > reference from loader.conf or 'kldload netgraph.ko'. What this changes is > what > happens when you do 'kldunload ng_foo.ko'. If you unload ng_foo.ko now, then > netgraph.ko will also be unloaded when its last reference drops (in this case > it looks like you actually have two ng_*.ko objects loaded, so you would have > to unload both of them, but I will assume a single ng_foo.ko to make the > explanation simpler). If you had not done 'kldunload netgraph.ko' but had > done 'kldunload ng_foo.ko', then the manual reference would have kept > netgraph.ko > loaded. > > All this logic exists so that if you do 'kldload foo.ko' and it auto-loads > bar.ko > as a dependency, then doing 'kldunload bar.ko' will unload both foo.ko and > bar.ko.
i have ng_ubt_load="YES" in my loader.conf and kldstat says: Id Refs Address Size Name 1 37 0xffffffff80100000 a2ddb8 kernel 2 1 0xffffffff80b2e000 295e8 snd_hda.ko 3 1 0xffffffff80b58000 85110 sound.ko 4 1 0xffffffff80bde000 cf79e0 nvidia.ko 5 5 0xffffffff818d6000 418c0 linux.ko 6 1 0xffffffff81918000 80e8 ng_ubt.ko 7 2 0xffffffff81921000 fa78 ng_hci.ko 8 2 0xffffffff81931000 2bd0 ng_bluetooth.ko 9 3 0xffffffff81934000 15e68 netgraph.ko 10 1 0xffffffff81a12000 3efb linprocfs.ko 11 3 0xffffffff81a16000 4698 pseudofs.ko 12 1 0xffffffff81a1b000 31b3 procfs.ko 13 1 0xffffffff81a1f000 a37 linsysfs.ko 14 1 0xffffffff81a20000 6f4 rtc.ko also the same happens with sound.ko. i have snd_hda_load="yes". and i think snd_hda is the only dependecy for sound.ko. there was no error message in dmesg for the first kldunload attempt. i think i understand the logic, however the current behavior does not confirm to the description in kldunload(2). cheers. alex > > -- > John Baldwin -- a13x _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
