Re: [RFC] c/r: prctl: Add ability to set new mm_struct::exe_file v3

[Cyrill Gorcunov <gorcunov@openvz.org>]

On Fri, Mar 09, 2012 at 04:21:22PM +0100, Oleg Nesterov wrote:
> 
> But, when you send the patch to Andrew, please remind that he
> should remove the evidence of my ignorance from -mm first.
> 

Ah, will ping him, sure. I'll send two patches in series
one -- this patch and second

"From: Andrew Vagin <avagin@openvz.org>"
"Subject: c/r: prctl: Add ability to get clear_tid_address"

for which I've got no feedback at all :( Is there some
fundamental problem with this patch? Or everyone simply
agree on it? ;) Anyway, I hope with next series I'll get
some feedback fron anyone in CC list :)

> 
> Just one note for the record, prctl_set_mm_exe_file() does
> 
> 	if (mm->num_exe_file_vmas)
> 		return -EBUSY;
> 
> We could do
> 
> 	if (mm->exe_file)
> 		return -EBUSY;
> 
> This way "because this feature is a special to C/R" becomes
> really true. IOW, you can't do PR_SET_MM_EXE_FILE twice.
> 

Sure, i'll make it this way. Thanks a lot, Oleg!!!

> I am fine either way, just I want to ensure you really want
> the current version.
> 

	Cyrill