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Mention that kmem_free(9) may block, just in a case it is not clear.

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rmind 2010-04-23 16:24:04 +00:00
parent f5b7f56dbd
commit 2ddb8da453
1 changed files with 9 additions and 3 deletions
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12
share/man/man9/kmem.9
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@ -1,4 +1,4 @@
.\" $NetBSD: kmem.9,v 1.7 2010/02/13 07:44:11 wiz Exp $
.\" $NetBSD: kmem.9,v 1.8 2010/04/23 16:24:04 rmind Exp $
.\"
.\" Copyright (c)2006 YAMAMOTO Takashi,
.\" All rights reserved.
@ -25,7 +25,7 @@
.\" SUCH DAMAGE.
.\"
.\" ------------------------------------------------------------
.Dd February 11, 2010
.Dd April 23, 2010
.Dt KMEM 9
.Os
.\" ------------------------------------------------------------
@ -144,6 +144,9 @@ caller can sleep for an unbounded amount of time in order to satisfy the
allocation.
This can in turn block other threads that wish to acquire locks held by the
caller.
It should be noted that
.Fn kmem_free
may also block.
.Pp
For some locks this is permissible or even unavoidable.
For others, particularly locks that may be taken from soft interrupt context,
@ -263,8 +266,11 @@ subsystem is implemented within the file
.Xr pool_cache 9
.\" ------------------------------------------------------------
.Sh CAVEATS
Neither
.Fn kmem_alloc
cannot be used from interrupt context, from a soft interrupt, or from
nor
.Fn kmem_free
can be used from interrupt context, from a soft interrupt, or from
a callout.
Use
.Xr pool_cache 9