s390/pci_dma: improve map_sg

Browse source

Our map_sg implementation mapped sg entries independently of each other.
For ease of use and possible performance improvements this patch changes
the implementation to try to map as many (likely physically non-contiguous)
sglist entries as possible into a contiguous DMA segment.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

...

This commit is contained in:

Sebastian Ott 2016-08-19 09:12:09 +02:00 • committed by Martin Schwidefsky

parent 8cb63b7879

commit ee877b81c6

1 changed files with 82 additions and 24 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

108

arch/s390/pci/pci_dma.c

View file