Re: Value of TASK_UNMAPPED_SIZE on 2.4

Kai Harrekilde-Petersen
2000-11-03T20:27:39Z

Andrea Arcangeli <andrea@suse.de> writes:

> On Fri, Nov 03, 2000 at 11:15:46AM -0800, Josue Emmanuel Amaro wrote:
> > (page.h). This works out to be a value of 0x4000000.
> ^ one more zero here
> > Are there any negative side effects in defining TASK_UNMAPPED_SIZE to 0x1000000?
>
> I guess you mean 0x10000000. There's no risk in doing that. I also did another
> patch that moves the kernel away and allows 3.5G per process on IA32 via plain
> mmap or shmat, but it has the downside of reducing a lot the ZONE_NORMAL where
> on IA32 buffercache and skb still lives.

Is this available as a patch, or preferably as a compilation option to
the standard kernel?

The ASIC tools that we use wants all the memory they can grab, and the
extra few hundred megs can sometimes be _very_ critical. On Solaris,
Synopsys' Design Compiler can allocate 3.8Gig and we've hit that limit
hard when working with toplevel netlists and SDF databases.

Thanks in advance,

Kai
--
Kai Harrekilde-Petersen