diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/rmap.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 46823fb0e80..cf7e99a87c3 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1151,9 +1151,11 @@ void page_remove_rmap(struct page *page) * containing the swap entry, but page not yet written to swap. * * And we can skip it on file pages, so long as the filesystem - * participates in dirty tracking; but need to catch shm and tmpfs - * and ramfs pages which have been modified since creation by read - * fault. + * participates in dirty tracking (note that this is not only an + * optimization but also solves problems caused by dirty flag in + * storage key getting set by a write from inside kernel); but need to + * catch shm and tmpfs and ramfs pages which have been modified since + * creation by read fault. * * Note that mapping must be decided above, before decrementing * mapcount (which luckily provides a barrier): once page is unmapped, |