On Tue, Sep 20, 2011 at 07:42:04PM +0530, Srikar Dronamraju wrote:

I could use any other inode/file/mapping based sleepable lock that is of
higher order than mmap_sem. Can you please let me know if we have
alternatives.

Please do not overload unrelated locks for this, but add a specific one.

There's two options:

 (a) add it to the inode (conditionally)
 (b) use global, hashed locks

I think (b) is good enough as adding/removing probes isn't exactly the
most critical fast path.

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