diff options
Diffstat (limited to 'Documentation/block/biodoc.txt')
| -rw-r--r-- | Documentation/block/biodoc.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt index 980a6e6f5981..c6c9a9c10d7f 100644 --- a/Documentation/block/biodoc.txt +++ b/Documentation/block/biodoc.txt @@ -183,7 +183,7 @@ it, the pci dma mapping routines and associated data structures have now been modified to accomplish a direct page -> bus translation, without requiring a virtual address mapping (unlike the earlier scheme of virtual address -> bus translation). So this works uniformly for high-memory pages (which -do not have a correponding kernel virtual address space mapping) and +do not have a corresponding kernel virtual address space mapping) and low-memory pages. Note: Please refer to DMA-mapping.txt for a discussion on PCI high mem DMA @@ -1013,7 +1013,7 @@ Characteristics: i. Binary tree AS and deadline i/o schedulers use red black binary trees for disk position sorting and searching, and a fifo linked list for time-based searching. This -gives good scalability and good availablility of information. Requests are +gives good scalability and good availability of information. Requests are almost always dispatched in disk sort order, so a cache is kept of the next request in sort order to prevent binary tree lookups. |