Messages in this thread | | | Date | Tue, 17 Dec 2002 19:19:08 +0200 | From | Matti Aarnio <> | Subject | Re: Intel P6 vs P7 system call performance |
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On Tue, Dec 17, 2002 at 09:07:21AM -0800, Linus Torvalds wrote: > On Tue, 17 Dec 2002, Hugh Dickins wrote: > > I thought that last page was intentionally left invalid? > > It was. But I thought it made sense to use, as it's the only really > "special" page.
In couple of occasions I have caught myself from pre-decrementing a char pointer which "just happened" to be NULL.
Please keep the last page, as well as a few of the first pages as NULL-pointer poisons.
> But yes, we should decide on this quickly - it's easy to change right now, > but.. > > Linus
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