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/freebsd-11.0-release/sys/dev/ata/
H A Data-all.hdiff 49614 Tue Aug 10 21:59:58 MDT 1999 sos Support DMA on ATAPI devices (finally).

This makes my system use only ~5% CPU on reading 4.5Mbyte/sec
from a CDROM, which before was limitted to 1.8Mbyte/sec due
to 100% CPU load..
H A Data-dma.cdiff 49614 Tue Aug 10 21:59:58 MDT 1999 sos Support DMA on ATAPI devices (finally).

This makes my system use only ~5% CPU on reading 4.5Mbyte/sec
from a CDROM, which before was limitted to 1.8Mbyte/sec due
to 100% CPU load..

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