Searched hist:"64 f52b0e31489b46465cff2e61ab2e1f60a3b4eb" (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/drivers/md/ |
| H A D | dm-core.h | diff 64f52b0e31489b46465cff2e61ab2e1f60a3b4eb Mon Dec 11 22:17:47 CST 2017 Mike Snitzer <snitzer@redhat.com> dm: improve performance by moving dm_io structure to per-bio-data
Eliminates need for a separate mempool to allocate 'struct dm_io'
objects from. As such, it saves an extra mempool allocation for each
original bio that DM core is issued.
This complicates the per-bio-data accessor functions by needing to
conditonally add extra padding to get to a target's per-bio-data. But
in the end this provides a decent performance improvement for all
bio-based DM devices.
On an NVMe-loop based testbed to a ramdisk (~3100 MB/s): bio-based
DM linear performance improved by 2% (went from 2665 to 2777 MB/s).
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
|
| H A D | dm.c | diff 64f52b0e31489b46465cff2e61ab2e1f60a3b4eb Mon Dec 11 22:17:47 CST 2017 Mike Snitzer <snitzer@redhat.com> dm: improve performance by moving dm_io structure to per-bio-data
Eliminates need for a separate mempool to allocate 'struct dm_io'
objects from. As such, it saves an extra mempool allocation for each
original bio that DM core is issued.
This complicates the per-bio-data accessor functions by needing to
conditonally add extra padding to get to a target's per-bio-data. But
in the end this provides a decent performance improvement for all
bio-based DM devices.
On an NVMe-loop based testbed to a ramdisk (~3100 MB/s): bio-based
DM linear performance improved by 2% (went from 2665 to 2777 MB/s).
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
|
| /openbmc/linux/include/linux/ |
| H A D | device-mapper.h | diff 64f52b0e31489b46465cff2e61ab2e1f60a3b4eb Mon Dec 11 22:17:47 CST 2017 Mike Snitzer <snitzer@redhat.com> dm: improve performance by moving dm_io structure to per-bio-data
Eliminates need for a separate mempool to allocate 'struct dm_io'
objects from. As such, it saves an extra mempool allocation for each
original bio that DM core is issued.
This complicates the per-bio-data accessor functions by needing to
conditonally add extra padding to get to a target's per-bio-data. But
in the end this provides a decent performance improvement for all
bio-based DM devices.
On an NVMe-loop based testbed to a ramdisk (~3100 MB/s): bio-based
DM linear performance improved by 2% (went from 2665 to 2777 MB/s).
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
|