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authorJan Kara <jack@suse.cz>2010-08-05 14:41:42 -0400
committerTheodore Ts'o <tytso@mit.edu>2010-08-05 14:41:42 -0400
commit56d35a4cd13e7bc5eca5b2dba5a41794afb17e11 (patch)
tree8173b2de9f0f2b596812a725ac1897efa0ba38fc /fs/ext4/file.c
parent0cfc9255a1efb0467de2162950197750570ecec0 (diff)
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ext4: Fix dirtying of journalled buffers in data=journal mode
In data=journal mode, we still use block_write_begin() to prepare page for writing. This function can occasionally mark buffer dirty which violates journalling assumptions - when a buffer is part of a transaction, it should be dirty and a buffer can be already part of a forget list of some transaction when block_write_begin() gets called. This violation of journalling assumptions then results in "JBD: Spotted dirty metadata buffer..." warnings. In fact, temporary dirtying the buffer while the page is still locked does not really cause problems to the journalling because we won't write the buffer until the page gets unlocked. So we just have to make sure to clear dirty bits before unlocking the page. Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4/file.c')
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