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| author | Jody McIntyre <scjody@modernduck.com> | 2006-03-28 20:24:39 -0500 |
|---|---|---|
| committer | Jody McIntyre <scjody@modernduck.com> | 2006-03-28 20:24:39 -0500 |
| commit | c0e4077c946104e5d8a62f835dcdca5c79c8af7d (patch) | |
| tree | c1f458722f86690a6172bbac2dfef3241ba0ec7e /Documentation/block/biodoc.txt | |
| parent | 94c2d01a537daf51a9fcf229d7d2204c979355d9 (diff) | |
| parent | ca9ba4471c1203bb6e759b76e83167fec54fe590 (diff) | |
Merge with git+ssh://master.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'Documentation/block/biodoc.txt')
| -rw-r--r-- | Documentation/block/biodoc.txt | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt index 8e63831971d..f989a9e839b 100644 --- a/Documentation/block/biodoc.txt +++ b/Documentation/block/biodoc.txt @@ -132,8 +132,18 @@ Some new queue property settings: limit. No highmem default. blk_queue_max_sectors(q, max_sectors) - Maximum size request you can handle in units of 512 byte - sectors. 255 default. + Sets two variables that limit the size of the request. + + - The request queue's max_sectors, which is a soft size in + in units of 512 byte sectors, and could be dynamically varied + by the core kernel. + + - The request queue's max_hw_sectors, which is a hard limit + and reflects the maximum size request a driver can handle + in units of 512 byte sectors. + + The default for both max_sectors and max_hw_sectors is + 255. The upper limit of max_sectors is 1024. blk_queue_max_phys_segments(q, max_segments) Maximum physical segments you can handle in a request. 128 |