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Commit ed9b3e33 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Theodore Ts'o
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ext4: Mark the buffer_heads as dirty and uptodate after prepare_write 



We need to make sure we mark the buffer_heads as dirty and uptodate
so that block_write_full_page write them correctly.

This fixes mmap corruptions that can occur in low memory situations.

Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent ac51d837

fs/ext4/inode.c

+2 −0
Original line number Diff line number Diff line
@@ -2329,6 +2329,8 @@ static int ext4_da_writepage(struct page *page, 
			unlock_page(page);

			return 0;

		}

		/* now mark the buffer_heads as dirty and uptodate */

		block_commit_write(page, 0, PAGE_CACHE_SIZE);

	}



	if (test_opt(inode->i_sb, NOBH) && ext4_should_writeback_data(inode))