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Commit 8f7b3d15 authored by Anton Salikhmetov's avatar Anton Salikhmetov Committed by Linus Torvalds
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Update ctime and mtime for memory-mapped files 



Update ctime and mtime for memory-mapped files at a write access on
a present, read-only PTE, as well as at a write on a non-present PTE.

Signed-off-by: default avatarAnton Salikhmetov <salikhmetov@gmail.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 667984d9

mm/memory.c

+6 −0
Original line number Diff line number Diff line
@@ -1670,6 +1670,9 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, 
unlock:

	pte_unmap_unlock(page_table, ptl);

	if (dirty_page) {

		if (vma->vm_file)

			file_update_time(vma->vm_file);



		/*

		 * Yes, Virginia, this is actually required to prevent a race

		 * with clear_page_dirty_for_io() from clearing the page dirty
@@ -2343,6 +2346,9 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma, 
	if (anon)

		page_cache_release(vmf.page);

	else if (dirty_page) {

		if (vma->vm_file)

			file_update_time(vma->vm_file);



		set_page_dirty_balance(dirty_page, page_mkwrite);

		put_page(dirty_page);

	}