psm0: [GIANT-LOCKED]

Kris Kennaway kris at obsecurity.org
Wed Jun 29 17:21:30 GMT 2005


On Sat, Jun 25, 2005 at 08:05:08PM -0700, Bill Schoolcraft wrote:
> Hello Family,
> 
> Well, now I just had one more question about the FreeBSD-5.4/amd64
> system I'm trying to get the mouse working on. I booted in "verbose"
> mode and spotted the following in dmesg:
> 
> ################################
> [root at liam ~]-> dmesg|grep psm0
> 
> psm0: current command byte:0047
> psm0: <PS/2 Mouse> flags 0x2000 irq 12 on atkbdc0
> psm0: [GIANT-LOCKED]
> psm0: model IntelliMouse Explorer, device ID 4-00, 5 buttons
> psm0: config:00002000, flags:00000008, packet size:4
> psm0: syncmask:08, syncbits:00
> 
> ################################
> 
> Does anyone have any idea what the "GIANT-LOCKED" comment means?

Essentially, the driver cannot take advantage of multiple CPUs.  See
the archives for further discussion.

Kris

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