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author | mav <mav@FreeBSD.org> | 2014-10-29 00:27:02 +0000 |
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committer | mav <mav@FreeBSD.org> | 2014-10-29 00:27:02 +0000 |
commit | f3c02a878d799d4d5abc2ec174fc878388f90392 (patch) | |
tree | 80e72bc81552e1e72aa17a7c14c09537084eb5af /share/man/man4/ada.4 | |
parent | 928386888ba740d10d5891223be7757b5099e310 (diff) | |
download | FreeBSD-src-f3c02a878d799d4d5abc2ec174fc878388f90392.zip FreeBSD-src-f3c02a878d799d4d5abc2ec174fc878388f90392.tar.gz |
MFC r273457: Document sort_io_queue sysctls/tunables.
Diffstat (limited to 'share/man/man4/ada.4')
-rw-r--r-- | share/man/man4/ada.4 | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/share/man/man4/ada.4 b/share/man/man4/ada.4 index 6b40880..86b6a08 100644 --- a/share/man/man4/ada.4 +++ b/share/man/man4/ada.4 @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd September 21, 2014 +.Dd October 22, 2014 .Dt ADA 4 .Os .Sh NAME @@ -123,6 +123,13 @@ seconds. This variable determines whether to spin-down disks when shutting down. Set to 1 to enable spin-down, 0 to disable. The default is currently enabled. +.It Va kern.cam.sort_io_queue +.It Va kern.cam.ada. Ns Ar X Ns Va .sort_io_queue +.Pp +These variables determine whether request queue should be sorted trying +to optimize head seeks. +Set to 1 to enable sorting, 0 to disable, -1 to leave it as-is. +The default is sorting enabled for HDDs and disabled SSDs. .It Va kern.cam.ada.read_ahead .It Va kern.cam.ada. Ns Ar X Ns Va .read_ahead .It Va kern.cam.ada.write_cache |