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| /freebsd-11-stable/sys/x86/x86/ | ||
| H A D | busdma_bounce.c | diff 137445 Tue Nov 09 05:07:54 MST 2004 scottl First pass at replacing the single global bounce pool with sub-pools that are appropriate for different tag requirements. With the former global pool, bounce pages might get allocated that are appropriate for one tag, but not appropriate for another, but the system had no way to distinguish between them. Now zones with distinct attributes are created to hold pages, and each tag that requires bouncing is associated with a zone. New zones are created as needed if no existing zones can meet the requirements of the tag. Stats for each zone are tracked via the hw.busdma sysctl node. This should help drivers that are failing with mysterious data corruption. MFC After: 1 week |
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