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| author | Jan Kara <jack@suse.cz> | 2013-06-04 13:21:11 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-06-04 13:21:11 -0400 |
| commit | 6b523df4fb5ae281ddbc817f40504b33e6226554 (patch) | |
| tree | f129ccf336689296ff21e34ed86712b25d437a65 /scripts/headers_check.pl | |
| parent | 3613d22807a2616e9346800bacd88aa8bbbefcd7 (diff) | |
| download | blackbird-op-linux-6b523df4fb5ae281ddbc817f40504b33e6226554.tar.gz blackbird-op-linux-6b523df4fb5ae281ddbc817f40504b33e6226554.zip | |
ext4: use transaction reservation for extent conversion in ext4_end_io
Later we would like to clear PageWriteback bit only after extent
conversion from unwritten to written extents is performed. However it
is not possible to start a transaction after PageWriteback is set
because that violates lock ordering (and is easy to deadlock). So we
have to reserve a transaction before locking pages and sending them
for IO and later we use the transaction for extent conversion from
ext4_end_io().
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'scripts/headers_check.pl')
0 files changed, 0 insertions, 0 deletions
