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ext4: use bio layer instead of buffer layer in mpage_da_submit_io

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Call the block I/O layer directly instad of going through the buffer
layer.  This should give us much better performance and scalability,
as well as lowering our CPU utilization when doing buffered writeback.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2010-10-27 21:30:10 -04:00
commit bd2d0210cf
6 changed files with 489 additions and 109 deletions
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