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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2013-09-04 10:24:01 +0200 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2013-09-04 10:39:34 +0200 |
| commit | 82a6092b03a29af915f239ee5a8d11edbeea06bf (patch) | |
| tree | 9d1442adbf4ce361e86641eb9d1093ade846e00c | |
| parent | 2785cd6ceeefaaad2dbeee4237927a978b98314b (diff) | |
futex.2: The 'timeout' can be rounded upwards by clock granularity and also overrun
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
| -rw-r--r-- | man2/futex.2 | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/man2/futex.2 b/man2/futex.2 index fea5e4ac..78e3de03 100644 --- a/man2/futex.2 +++ b/man2/futex.2 @@ -50,7 +50,7 @@ .\" .\" See Documentation/futex-requeue-pi.txt .\" -.TH FUTEX 2 2013-07-30 "Linux" "Linux Programmer's Manual" +.TH FUTEX 2 2013-09-04 "Linux" "Linux Programmer's Manual" .SH NAME futex \- fast user-space locking .SH SYNOPSIS @@ -116,8 +116,13 @@ and sleeps awaiting on this futex address. If the .I timeout -argument is non-NULL, its contents describe the minimum -duration of the wait, which is infinite otherwise. +argument is non-NULL, its contents specify the duration of the wait. +(This interval will be rounded up to the system clock granularity, +and kernel scheduling delays mean that the +blocking interval may overrun by a small amount.) +If +.I timeout +is NULL, the call blocks indefinitely. The arguments .I uaddr2 and |