Re: [PATCH v4 3.0-rc2-tip 7/22] 7: uprobes: mmap and fork hooks.

Peter Zijlstra
2011-07-18T14:31:55Z

On Mon, 2011-07-18 at 14:50 +0530, Srikar Dronamraju wrote:
> * - Introduce uprobes_list and uprobes_vaddr in vm_area_struct.
> * uprobes_list is a node in the temp list of vmas while
> * registering/unregistering uprobes. uprobes_vaddr caches the vaddr to
> * insert/remove the breakpoint.
> *
> * - Introduce srcu to synchronize vma deletion with walking the list of
> * vma in register/unregister_uprobe.

I don't think you can sell this, that'll make munmap() horridly slow.

> * - Introduce uprobes_mmap_mutex to synchronize uprobe deletion and
> * mmap_uprobe().

Yes, that'll work I think.