tree 1e0110780ac0a8eeef2629e1d5880602bd6003c0
parent 09f586b35d8503b57de1e0e9b19bc6b38e0d7319
author Andrea Arcangeli <aarcange@redhat.com> 1297792965 +0100
committer Linus Torvalds <torvalds@linux-foundation.org> 1297812071 -0800

thp: prevent hugepages during args/env copying into the user stack

Transparent hugepages can only be created if rmap is fully
functional. So we must prevent hugepages to be created while
is_vma_temporary_stack() is true.

This also optmizes away some harmless but unnecessary setting of
khugepaged_scan.address and it switches some BUG_ON to VM_BUG_ON.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>