Messages in this thread | | | Date | Tue, 26 Jun 2007 22:04:11 -0700 | From | "Ulrich Drepper" <> | Subject | Re: [patch 2/3] MAP_NOZERO - implement sys_brk2() |
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On 6/26/07, Rik van Riel <riel@redhat.com> wrote: > After going through the first malloc()/free() cycle, surely > the memory will no longer be zeroed on the second malloc() ?
If returned to the system, sure.
> What makes the first brk malloc so special?
If the memory is zeroed it needs not be initialized by malloc. No calloc zeroing, no pointer clearing.
Anyway, it's irrelevant what the benefits are, the fact is current code depends on brk to zero the memory and you'd break the ABI if you'd change it. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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