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
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.
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