Re: Bug in last night's bk test

[Badari Pulavarty]

> 
> Paul Larson wrote:
> > 
> > The automated nightly testing turned up a bug on one of the test
> > machines last night.  The system that had the problem was running ltp
> > and was a 2-way PII-550, 2GB ram, ext2.  Here is the ksymoops dump:
> > 
> > ksymoops 2.4.5 on i686 2.4.18.  Options used
> >      -V (default)
> >      -K (specified)
> >      -L (specified)
> >      -O (specified)
> >      -m System.map (specified)
> > 
> > kernel BUG at ll_rw_blk.c:1802!
> 
> Ah, yes.
> 
> The direct-io code will build requests which are larger than
> the ips driver is prepared to accept, and the BIO layer correctly
> BUGs out over it.
> 
> We need to convert direct-io to use the bio_add_page() facility
> which Jens has recently added.
> 
> Until that's done you'll need to set BIO_MAX_PAGES to 16 in
> include/linux/bio.h
> 

I am little confused here. I thought IPS driver can handle 64K IO.
Infact, IPS_MAX_SG is set to 17. So it should be able to handle 68K.
I have been told that it can handle more than that.. but for some
reason it was set to 17.

Paul, what kernel are u running ? 2.5.38 ? 

- Badari