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| author | sheldonh <sheldonh@FreeBSD.org> | 2000-03-03 14:05:08 +0000 |
|---|---|---|
| committer | sheldonh <sheldonh@FreeBSD.org> | 2000-03-03 14:05:08 +0000 |
| commit | 88dd9b4faa11f5f0aa21cbd43fb72503a67b4229 (patch) | |
| tree | 69062af71195d869d2c940c1869ddf1621cbabfb /share/man/man9/physio.9 | |
| parent | 1b7dce690e9fb2a298fb1e3bedc8186e71b877a3 (diff) | |
| download | FreeBSD-src-88dd9b4faa11f5f0aa21cbd43fb72503a67b4229.zip FreeBSD-src-88dd9b4faa11f5f0aa21cbd43fb72503a67b4229.tar.gz | |
Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.
Diffstat (limited to 'share/man/man9/physio.9')
| -rw-r--r-- | share/man/man9/physio.9 | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/share/man/man9/physio.9 b/share/man/man9/physio.9 index 02114fa..27eb6d3 100644 --- a/share/man/man9/physio.9 +++ b/share/man/man9/physio.9 @@ -53,7 +53,8 @@ The .Fn physio is a helper function typically called from character device read and write -routines to start I/O on a user process buffer. It calls back on the +routines to start I/O on a user process buffer. +It calls back on the provided .Fa strategy routine one or more times to complete the transfer described by @@ -62,7 +63,8 @@ The maximum amount of data to transfer with each call to .Fa strategy is determined by the .Fa minphys -routine. Since +routine. +Since .Fa uio normally describes user space addresses, .Fn physio @@ -71,7 +73,8 @@ needs to lock the process into memory. This is done by setting the flag on the process. .Fn physio always awaits the completion of the entire requested transfer before -returning, unless an error condition is detected earlier. In all cases, +returning, unless an error condition is detected earlier. +In all cases, the buffer passed in .Fa bp is locked (marked as @@ -84,11 +87,13 @@ A break-down of the arguments follows: The device strategy routine to call for each chunk of data to initiate device I/O. .It Fa bp -The buffer to use with the strategy routine. The buffer flags will have +The buffer to use with the strategy routine. +The buffer flags will have .Dv B_BUSY , and .Dv B_PHYS -set when passed to the strategy routine. If +set when passed to the strategy routine. +If .Dv NULL , a buffer is allocated from a system pool. .It Fa dev @@ -126,7 +131,8 @@ by examining the .Dv B_ERROR buffer flag and the .Va b_error -field. Note that the actual transfer size may be less than requested by +field. +Note that the actual transfer size may be less than requested by .Fa uio if the device signals an .Dq end of file |
