On 16.03.2015 17:50, Davidlohr Bueso wrote:
On Mon, 2015-03-16 at 15:07 +0100, Oleg Nesterov wrote:
3. and we can remove down_write(mmap_sem) from prctl paths.
Actually we can do this even without xchg() above, but we might
want to kill MMF_EXE_FILE_CHANGED and test_and_set_bit() check.
Yeah I was waiting for security folks input about this, otherwise this
still doesn't do it for me as we still have to deal with mmap_sem.
Why? mm->flags are updated atomically. mmap_sem isn't required here.
--
Konstantin
--
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/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>