ext4: cleanup pagecache before swap i_data

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While do swap, we should make sure there has no new dirty page since we
should swap i_data between two inode:
1.We should lock i_mmap_sem with write to avoid new pagecache from mmap
read/write;
2.Change filemap_flush to filemap_write_and_wait and move them to the
space protected by inode lock to avoid new pagecache from buffer read/write.

Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

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yangerkun 2019-02-11 00:05:24 -05:00 • committed by Theodore Ts'o

parent 67a11611e1

commit a46c68a318

1 changed files with 12 additions and 4 deletions

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fs/ext4/ioctl.c

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