Re: [PATCH 0/1] turn mm->exe_file into mm->exe_path

[Cyrill Gorcunov]

On Mon, Mar 05, 2012 at 06:33:14PM +0100, Oleg Nesterov wrote:
> 
> > Not sure where we may use PR_SET_MM_EXE_PATH with NULL to kill
> > num_exe_file_vmas from user space though
> 
> Please see above:
> 
> 	Why do we need mm->num_exe_file_vmas? Afaics it is only needed to
> 	"free" mm->exe_file if the application unmaps all these vmas. Say,
> 	to allow to unmount fs.
> 
> If we remove this counter, the application can't do the final put.
> But if we add PR_SET_MM_EXE_PATH which accepts NULL we solve this
> problem and this works for c/r too.
> 
> Of course, this is orthogonal to the patch I sent.
> 

I see. Thanks, Oleg!

	Cyrill
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