diff options
| author | Mark Lord <mlord@pobox.com> | 2009-02-25 23:13:03 +0300 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-03-25 05:02:40 +0300 |
| commit | 08da175937a35d34a83eaefbb3458472eb1a89d4 (patch) | |
| tree | 32e8be09d7fc0c878b479a65666a18b0341b7529 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | a5bfc4714b3f01365aef89a92673f2ceb1ccf246 (diff) | |
| download | linux-08da175937a35d34a83eaefbb3458472eb1a89d4.tar.xz | |
[libata] sata_mv: cache frequently-accessed registers
Maintain a local (mv_port_priv) cache of frequently accessed registers,
to avoid having to re-read them (very slow) on every transistion
between EDMA and non-EDMA modes. This speeds up things like
flushing the drive write cache, and anything using basic DMA transfers.
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions