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Note EX_EARLY

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skrll 2017-08-28 06:16:14 +00:00
parent 2dc39176ee
commit f14cba08bb
1 changed files with 11 additions and 2 deletions
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13
share/man/man9/extent.9
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@ -1,4 +1,4 @@
.\" $NetBSD: extent.9,v 1.34 2017/07/03 21:28:48 wiz Exp $ .\" $NetBSD: extent.9,v 1.35 2017/08/28 06:16:14 skrll Exp $
.\" .\"
.\" Copyright (c) 1996, 1998 The NetBSD Foundation, Inc. .\" Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
.\" All rights reserved. .\" All rights reserved.
@ -133,6 +133,13 @@ may be passed to allocation requests to indicate that a fixed extent
map may be extended using a call to map may be extended using a call to
.Fn malloc . .Fn malloc .
.Pp .Pp
If the flag
.Dv EX_EARLY
is specified, no
.Xr mutex 9
calls are made in the expecation that
mutual exclusion is not avilable or required.
.Pp
.Fn extent_destroy .Fn extent_destroy
destroys the extent map destroys the extent map
.Fa ex , .Fa ex ,
@ -275,7 +282,9 @@ Print out information about extent
This function always succeeds. This function always succeeds.
Behavior is undefined if invalid arguments are provided. Behavior is undefined if invalid arguments are provided.
.Sh LOCKING .Sh LOCKING
The extent manager performs all necessary locking on the extent map The extent manager performs all necessary locking (unless
.Dv EX_EARLY
is specified) on the extent map
itself, and any other data structures internal to the extent manager. itself, and any other data structures internal to the extent manager.
The locks used by the extent manager are simplelocks, and will never sleep The locks used by the extent manager are simplelocks, and will never sleep
.Po .Po