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Diffstat (limited to 'share/man/man9/spl.9')
| -rw-r--r-- | share/man/man9/spl.9 | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/share/man/man9/spl.9 b/share/man/man9/spl.9 index b58ed2f0250..047a6bf213c 100644 --- a/share/man/man9/spl.9 +++ b/share/man/man9/spl.9 @@ -1,4 +1,4 @@ -.\" $OpenBSD: spl.9,v 1.19 2004/12/01 02:39:04 jsg Exp $ +.\" $OpenBSD: spl.9,v 1.20 2005/05/25 23:17:47 niklas Exp $ .\" $NetBSD: spl.9,v 1.1 1997/03/11 06:15:05 mikel Exp $ .\" .\" Copyright (c) 1997 Michael Long. @@ -102,6 +102,15 @@ blocks hard interrupts from serial interfaces. Code running at this level may not access the tty subsystem. .It Fn splsched blocks interrupts that may access scheduler data structures. +Specifically the clock interrupt that invokes the +.Fn schedclock +function, needs to be blocked. On some systems this is a +separate clock, on others it is the same as the statistics +clock, and on these, +.Fn splsched +must block everything that +.Fn splstatclock +does. Code running at or above this level may not call .Fn sleep , .Fn tsleep , |