mm-madvise-skip-unmapped-vma-holes-passed-to-process_madvise.patch removed from -mm tree

The patch titled
Subject: mm: madvise: skip unmapped vma holes passed to process_madvise
has been removed from the -mm tree. Its filename was
mm-madvise-skip-unmapped-vma-holes-passed-to-process_madvise.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Charan Teja Kalla <[email protected]>
Subject: mm: madvise: skip unmapped vma holes passed to process_madvise

The process_madvise() system call is expected to skip holes in vma passed through 'struct iovec' vector list. But do_madvise, which process_madvise() calls for each vma, returns ENOMEM in case of unmapped holes, despite the VMA is processed.

Thus process_madvise() should treat ENOMEM as expected and consider the VMA passed to as processed and continue processing other vma's in the vector list. Returning -ENOMEM to user, despite the VMA is processed, will be unable to figure out where to start the next madvise.

---

 mm/madvise.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

@@ -1428,9 +1428,16 @@ SYSCALL_DEFINE5(process_madvise, int, pi
 
 	while (iov_iter_count(&iter)) {
 		iovec = iov_iter_iovec(&iter);
+		/*
+		 * do_madvise returns ENOMEM if unmapped holes are present
+		 * in the passed VMA. process_madvise() is expected to skip
+		 * unmapped holes passed to it in the 'struct iovec' list
+		 * and not fail because of them. Thus treat -ENOMEM return
+		 * from do_madvise as valid and continue processing.
+		 */
 		ret = do_madvise(mm, (unsigned long)iovec.iov_base,
 					iovec.iov_len, behavior);
-		if (ret < 0)
+		if (ret < 0 && ret != -ENOMEM)
 			break;
 		iov_iter_advance(&iter, iovec.iov_len);
 	}

_

Patches currently in -mm which might be from [email protected] are