All issues regarding my FC driver so far are resolved with:
1, changed SD_EXTRA_DEVS and rebuilt kernel,
2, Mknod with different major number
3, loading SMP driver successfully with "set version information" being
disabled using make menuconfig.
Now driver is testing under SMP environment (UP environemnt has been
tested).
-eddie
-----Original Message-----
From: gokhan sozmen [mailto:gokhan_sozmen@hotbot.com]
Sent: Friday, October 01, 1999 12:17 PM
To: linux-kernel@vger.rutgers.edu
Subject: Re: Need help on two issues from Linux Guru
In respose to:
Need help on two issues from Linux Guru. WANG,YIDING
>Alan Cox wrote:
>
> > I am trying to make module run under SMP system (Viper with 8 CPUs) but
> > failed in loading process. System message:
> > ./hpfc: kernel was compiled for kernel version 2.2.5-15
> > while this kernel is version 2.2.5-15smp
>
> This is a non SMP module built against an SMP kernel. In this case its
> a Red Hat specific "accident trap". Add smp to the EXTRAVERSION flag sin
> the top make file
>
> I would actually suggest you pick up a newer kernel (2.2.12 say) and built
> that from scratch with your driver, rather than trying to build your
modules
> without having a full kernel build tree to hand
>
> > those 10 tested devices. However, after successfully detected all 10
> > devices, only four device nodes are given to be accessible, sdb, sdc,
sdd,
> > sde. Two of them from first HBA and two from the second.
>
> Very odd.
>
> > I also tried qlogic fibre channel HBA with 8 device connected. The
result
> > is the same. Only four devices are accessible.
>
> I've actually had 8 disks on a qlogic FC without a problem.
Doug Ledford wrote:
>This is the old "you have sd.o insmod'ed before the SCSI driver or compiled
>directly into the kernel so it only finds as many drives as there were
spare
>disk structs when it init'ed" problem.
Right, if your SCSI driver is loaded as a module
you can only see 4 SCSI disks because this is the
number of extra disk structs available after sd
installs.
To get around this limitation, either:
a) Build your driver into the kernel, OR
b) If you want to keep your driver as a module,
change in usr/src/linux/drivers/scsi/hosts.h
#define SD_EXTRA_DEVS 4
to
#define SD_EXTRA_DEVS <number you want>
and rebuild your kernel
rgds
Gokhan Sozmen
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