There is something I don't understand about loading and unloading kernel
modules.
I have a SATA controller, it uses a sata_mv driver.
The drive connected to it is not used; it just "merely exists" - no one
touches it.
This is why I don't understand why I can't remove such a module:
1.
# rmmod sata_mv
ERROR: Module sata_mv is in use
The module was loaded automatically during the system boot.
mount claims no /dev/sda* partition is mounted.
2.
In a second scenario, I move the kernel:
# mv /lib/modules/2.6.19/kernel/drivers/ata/sata_mv.ko /root
# reboot
And load it later manually:
# insmod ./sata_mv
# dmesg -c
sata_mv 0000:01:00.0: version 0.7
ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 20 (level, low) -> IRQ 23
(...)
SCSI device sda: drive cache: write back
sda: sda1
sd 24:0:0:0: Attached scsi disk sda
We can remove the module without problems:
# rmmod sata_mv
# dmesg -c
Synchronizing SCSI cache for disk sda:
ACPI: PCI interrupt for device 0000:01:00.0 disabled
Now I could remove the module without problems.
What was using the module in the first scenario (I couldn't remove the
module)?
--
Tomasz Chmielewski
http://wpkg.org
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