diff options
Diffstat (limited to 'lib/libc/stdlib/malloc.3')
| -rw-r--r-- | lib/libc/stdlib/malloc.3 | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/lib/libc/stdlib/malloc.3 b/lib/libc/stdlib/malloc.3 index 7138ead..466accc 100644 --- a/lib/libc/stdlib/malloc.3 +++ b/lib/libc/stdlib/malloc.3 @@ -32,7 +32,7 @@ .\" @(#)malloc.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd December 27, 2007 +.Dd January 3, 2008 .Dt MALLOC 3 .Os .Sh NAME @@ -245,7 +245,7 @@ This option is not available for some configurations (non-PIC). Use .Xr mmap 2 to acquire anonymously mapped memory. -This option is disabled by default. +This option is enabled by default. If both the .Dq D and @@ -335,24 +335,24 @@ Traditionally, allocators have used to obtain memory, which is suboptimal for several reasons, including race conditions, increased fragmentation, and artificial limitations on maximum usable memory. -This allocator uses -.Xr sbrk 2 -by default in order to facilitate resource limits, but it can be configured at -run time to use +This allocator uses both .Xr sbrk 2 -and/or -.Xr mmap 2 . +and +.Xr mmap 2 +by default, but it can be configured at run time to use only one or the other. If resource limits are not a primary concern, the preferred configuration is .Ev MALLOC_OPTIONS=dM or .Ev MALLOC_OPTIONS=DM . When so configured, the .Ar datasize -resource limit has little practical effect for typical applications. -The +resource limit has little practical effect for typical applications; use +.Ev MALLOC_OPTIONS=Dm +if that is a concern. +Regardless of allocator configuration, the .Ar vmemoryuse -resource limit, however, can be used to bound the total virtual memory used by -a process, as described in +resource limit can be used to bound the total virtual memory used by a +process, as described in .Xr limits 1 . .Pp This allocator uses multiple arenas in order to reduce lock contention for |
