| From | Kamal Mostafa <> | Subject | [PATCH 3.13.y-ckt 079/132] ext4: call sync_blockdev() before invalidate_bdev() in put_super() | Date | Wed, 22 Jul 2015 18:59:57 -0700 |
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3.13.11-ckt24 -stable review patch. If anyone has any objections, please let me know.
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From: Theodore Ts'o <tytso@mit.edu>
commit 89d96a6f8e6491f24fc8f99fd6ae66820e85c6c1 upstream.
Normally all of the buffers will have been forced out to disk before we call invalidate_bdev(), but there will be some cases, where a file system operation was aborted due to an ext4_error(), where there may still be some dirty buffers in the buffer cache for the device. So try to force them out to memory before calling invalidate_bdev().
This fixes a warning triggered by generic/081:
WARNING: CPU: 1 PID: 3473 at /usr/projects/linux/ext4/fs/block_dev.c:56 __blkdev_put+0xb5/0x16f()
Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- fs/ext4/super.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 9fb3e6c..a07af5b 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -832,6 +832,7 @@ static void ext4_put_super(struct super_block *sb) dump_orphan_list(sb, sbi); J_ASSERT(list_empty(&sbi->s_orphan)); + sync_blockdev(sb->s_bdev); invalidate_bdev(sb->s_bdev); if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { /* -- 1.9.1
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