diff options
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 1dcaeda..05c8512 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -398,10 +398,9 @@ void free_swap_and_cache(swp_entry_t entry) } /* - * Always set the resulting pte to be nowrite (the same as COW pages - * after one process has exited). We don't know just how many PTEs will - * share this swap entry, so be cautious and let do_wp_page work out - * what to do if a write is requested later. + * No need to decide whether this PTE shares the swap entry with others, + * just let do_wp_page work it out if a write is requested later - to + * force COW, vm_page_prot omits write permission from any private vma. * * vma->vm_mm->page_table_lock is held. */ |
