mm/memory.c: don't forget to set softdirty on file mapped fault
Otherwise we may not notice that pte was softdirty because pte_mksoft_dirty helper _returns_ new pte but doesn't modify the argument. In case if page fault happend on dirty filemapping the newly created pte may loose softdirty bit thus if a userspace program is tracking memory changes with help of a memory tracker (CONFIG_MEM_SOFT_DIRTY) it might miss modification of a memory page (which in worts case may lead to data inconsistency). Signed-off-by:Cyrill Gorcunov <gorcunov@openvz.org> Acked-by:
Pavel Emelyanov <xemul@parallels.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
parent
f0093ede
Please register or sign in to comment