Re: lock_kernel twice possible ?

From: Mitchell Blank Jr
Date: Sat Oct 15 2005 - 02:47:13 EST

li nux wrote:
> Sorry, couldn't get what you want to say.
> Can you please elaborate.

A "recursive lock" is one that can be taken multiple times by the same
owner. So:


is perfectly ok. The lock_kernel() code detects that the calling thread
already owns the lock and just increments current->lock_depth.

Under linux locks are non-recursive EXCEPT for lock_kernel() (aka the BLK
or "big kernel lock")

See lib/kernel_lock.c for more details.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at