diff options
Diffstat (limited to 'lib/libc/sys/fcntl.2')
| -rw-r--r-- | lib/libc/sys/fcntl.2 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/libc/sys/fcntl.2 b/lib/libc/sys/fcntl.2 index b2911e5..479e097 100644 --- a/lib/libc/sys/fcntl.2 +++ b/lib/libc/sys/fcntl.2 @@ -147,6 +147,11 @@ corresponds to the .Dv O_APPEND flag of .Xr open 2 . +.It Dv O_DIRECT +Minimize or eliminate the cache effects of reading and writing. The system +will attempt to avoid caching the data you read or write. If it cannot +avoid caching the data, it will minimize the impact the data has on the cache. +Use of this flag can drastically reduce performance if not used with care. .It Dv O_ASYNC Enable the .Dv SIGIO |
