Re: [RFC] [PATCH 2.6.37-rc5-tip 8/20] 8: uprobes: mmap and fork hooks.

[Srikar Dronamraju <srikar@linux.vnet.ibm.com>]

* Peter Zijlstra <peterz@infradead.org> [2011-01-26 16:16:49]:

> On Wed, 2011-01-26 at 20:29 +0530, Srikar Dronamraju wrote:
> > list_for_each_entry_safe(mm, tmpmm, &tmp_list, uprobes_list) {
> >                 down_read(&mm->map_sem);
> >                 if (!install_uprobe(mm, uprobe))
> >                         ret = 0;
> >                 up_read(&mm->map_sem);
> >                 list_del(&mm->uprobes_list);
> >                 mmput(mm);
> > } 
> 
> and the tmp_list thing works because new mm's will hit the mmap callback
> and you cannot loose mm's due to the refcount, right?
> 

Right, In other words, the tmp_list has all mm's that have already
running and have this inode mapped as executable text. Those process
that are yet to start or yet to map the inode as executable text
will hit mmap and then we look at inserting the probes thro
uprobes_mmap. 

-- 
Thanks and Regards
Srikar
>