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Diffstat (limited to 'man2/futex.2')
| -rw-r--r-- | man2/futex.2 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/man2/futex.2 b/man2/futex.2 index d0bb98e4bd..2eeb9b31e6 100644 --- a/man2/futex.2 +++ b/man2/futex.2 @@ -113,6 +113,18 @@ argument consists of two parts: a command that specifies the operation to be performed, bit-wise ORed with zero or or more options that modify the behaviour of the operation. +The options that may be included in +.I op +are as follows: +.TP +.BR FUTEX_PRIVATE_FLAG " (since Linux 2.6.22)" +.\" commit 34f01cc1f512fa783302982776895c73714ebbc2 +This option bit can be employed with all futex operations. +It tells the kernel that the futex is process private and not shared +with another process. +This allows the kernel to choose the fast path for validating +the user-space address and avoids expensive VMA lookups, +taking reference counts on file backing store, and so on. .PP The operation specified in .I op |