diff options
Diffstat (limited to 'share/man/man9/VOP_RDWR.9')
-rw-r--r-- | share/man/man9/VOP_RDWR.9 | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/share/man/man9/VOP_RDWR.9 b/share/man/man9/VOP_RDWR.9 index 5e67262..a1e28fd 100644 --- a/share/man/man9/VOP_RDWR.9 +++ b/share/man/man9/VOP_RDWR.9 @@ -60,7 +60,11 @@ the credentials of the caller .Pp The .Fa ioflag -argument is a bit mask which can contain the following flags: +argument is used to give directives and hints to the filesystem. +When attempting a read, the high 16 bits are used to provide a +read-ahead hint (in units of filesystem blocks) that the filesystem +should attempt. The low 16 bits are a bit mask which can contain +the following flags: .Bl -tag -width IO_NODELOCKED .It Dv IO_UNIT do I/O as atomic unit |