[DRBD-user] Kernel Oops: 0002 again after reboot...

[Dan Didier]

> -----Original Message-----
> From: Lars Ellenberg [mailto:Lars.Ellenberg at linbit.com] 
> Sent: Tuesday, August 31, 2004 2:40 PM
> To: Dan Didier
> Cc: drbd-user at lists.linbit.com
> Subject: Re: [DRBD-user] Kernel Oops: 0002 again after reboot...
> 
> / 2004-08-31 14:24:37 -0400
> \ Dan Didier:
> > > > I told you to DISABLE SENDPAGE.
> > > 
> > > Lars, I'm sorry, I looked through your previous messages 
> and I did 
> > > not see where you said to DISABLE SENDPAGE.
> 
> hm. then I mixed up with that other, but probably related thread...
> 
> > > I am assuming this is a setting in the 0.7.3 drbd_config.h file?
> > > I'm not sure how to disable it... I'm not that familiar.
> > 
> > OK, found this in one of your other posts:
> > 
> > please disable tcp_sendpage altogether, and verify if this helped. 
> > i.e., get a fresh svn checkout,
> > and define DRBD_DISALE_SENDPAGE in drbd_config.h ... 
> > 
> > Enabled that in 0.7.3 and I try to compile:
> > 
> > In file included from drbd_worker.c:38:
> > /usr/src/linux-2.4.20-8/include/linux/mm_inline.h:28: warning:
> > initialization makes integer from pointer without a cast
> > /usr/src/linux-2.4.20-8/include/linux/mm_inline.h:28: initializer 
> > element is not computable at load time
> > make[3]: *** [drbd_worker.o] Error 1
> > make[3]: Leaving directory `/var/src/drbd-0.7.3/drbd'
> > make[2]: *** [_mod_/var/src/drbd-0.7.3/drbd] Error 2
> > make[2]: Leaving directory `/usr/src/linux-2.4.20-8'
> > make[1]: *** [kbuild] Error 2
> > make[1]: Leaving directory `/var/src/drbd-0.7.3/drbd'
> > make: *** [all] Error 2
> > 
> > I know you gave me some input on this in a previous message, but my 
> > compiler has worked up until this point, and I'm assuming 
> sincd 0.7.2 
> > worked, this should too??????
> 
> in principle, yes :-/
> please give me the context (mm_inline.h around line 28).

Here it is

 */

GPL_HEADER()

/*
 * These inline functions tend to need bits and pieces of all the
 * other VM include files, meaning they cannot be defined inside
 * one of the other VM include files.
 *
> 
> does a make mrproper in the kernel source tree help?
>   (you'd need to copy in the correct .config,
>    make oldconfig, make dep, that sort of stuff afterwards again, too)

Tried this, didn't help..
> 
> or, use the version of drbd that currently works for you, and 
> (as I wrote in some other post already):
> 
>   seemingly we have an issue with 2.4. code.
>   maybe we just forgot to update some of the endless 
> #if/#endif branches
>   for 2.4. with fixes that only went into some 2.6. branches.
>   maybe it is not as easy as that. I don't know yet.
>   
>   for now, you could simply find in drbd_main.c, in function
>   _drbd_send_page the line (ca 940) where it says
>   
>           if ( (page_count(page) < 1) || PageSlab(page) ) {
>   
>   
>   and replace that with
>           if ( 1 ) {


I tried this with source not compiling when done...  I'll try again and
post output.
I still don't understand why it was syncing, slowly, but syncing the
first time.  Then I decided to reboot and then all it does is give me
the oops... Probably because I don't understand the kernel well enough.

Thanks,
Dan

>   
>   thanks.
>   
> 
> now, recompile, install, and of course _reload_ the drbd module!
> 
> hth,
> 	Lars Ellenberg
>