From: Paul Jackson <pj@sgi.com>
To: Vincent Lefevre <vincent@vinc17.org>
Cc: linux-kernel@vger.kernel.org,
"Richard B. Johnson" <root@chaos.analogic.com>
Subject: Re: [2.4.26] overcommit_memory documentation clarification
Date: Sun, 9 May 2004 14:06:11 -0700 [thread overview]
Message-ID: <20040509140611.28e4b2bf.pj@sgi.com> (raw)
In-Reply-To: <20040509022043.GE23263@ay.vinc17.org>
Vincent wrote:
> NULL == (void *) 0 and NULL == 0 must be true
Yes - NULL is compares equal to both (void *)0 and 0.
No - not necessarily the _same_ value - one could be
on a system with 32 bit ints, 64 bit pointers, for example.
> The goal of malloc is to reserve memory.
It's up to the kernel whether sbrk (used by malloc to
obtain virtual address space) reserves memory or not.
Check out:
/proc/sys/vm/overcommit_memory
Documentation/sysctl/vm.txt - overcommit_memory
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.650.933.1373
next prev parent reply other threads:[~2004-05-09 21:01 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-09 0:10 [2.4.26] overcommit_memory documentation clarification Vincent Lefevre
2004-05-09 2:04 ` Richard B. Johnson
2004-05-09 2:20 ` Vincent Lefevre
2004-05-09 21:06 ` Paul Jackson [this message]
2004-05-09 21:49 ` Vincent Lefevre
2004-05-27 12:20 ` Marcelo Tosatti
2004-05-27 12:30 ` Marc-Christian Petersen
2004-05-27 13:09 ` Marcelo Tosatti
2004-05-27 13:19 ` Dave Jones
2004-05-27 21:12 ` Alan Cox
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