tree 2c244fdf033f858147875333024838e493d9e43e
parent 4b1977698ceb4c4caa800d475127139da49966f9
author Malahal Naineni <malahal@us.ibm.com> 1285352749 +0200
committer Jens Axboe <jaxboe@fusionio.com> 1285352836 +0200

block: set the bounce_pfn to the actual DMA limit rather than to max memory

The bounce_pfn of the request queue in 64 bit systems is set to the
current max_low_pfn. Adding more memory later makes this incorrect.
Memory allocated beyond this boot time max_low_pfn appear to require
bounce buffers (bounce buffers are actually not allocated but used in
calculating segments that may result in "over max segments limit"
errors).

Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>