Re: [PATCH 6/7] mm: kill vma flag VM_EXECUTABLE

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Cyrill Gorcunov wrote:
On Sat, Mar 31, 2012 at 10:13:24PM +0200, Oleg Nesterov wrote:

Add Cyrill. This conflicts with
c-r-prctl-add-ability-to-set-new-mm_struct-exe_file.patch in -mm.

Thanks for CC'ing, Oleg. I think if thise series go in it won't
be a problem to update my patch accordingly.

In this patch I leave mm->exe_file lockless.
After exec/fork we can change it only for current task and only if mm->mm_users == 1.

something like this:

task_lock(current);
if (atomic_read(&current->mm->mm_users) == 1)
	set_mm_exe_file(current->mm, new_file);
else
	ret = -EBUSY;
task_unlock(current);

task_lock() protect this code against get_task_mm()

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>


[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]