>
> G'Day,
>
> On Mon, 10 Mar 1997, Richard B. Johnson wrote:
> > Hello memory manager wizards........
> >
> > What #define do I change and were to get some more pages for Disc I/O?
> > I can't write a large amount of data to a raw SCSI device for testing.
> > I use the BusLogic driver. It gets memory for "DMA" from the kernel.
> > It runs out and hangs.
>
> I'm not familiar with the BusLogic driver, but a quick peek shows
> it does allocations atomically. Do you know what order of pages
> it is asking for?
>
> You could make the kswapd (mm/vmscan.c) more aggressive, although that
> will hit your over all performance. Try a few values for the following;
[SNIPPED substantial info....]
Thanks, I'll look into this.
Cheers,
Dick Johnson
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Richard B. Johnson
Project Engineer
Analogic Corporation
Voice : (508) 977-3000 ext. 3754
Fax : (508) 532-6097
Modem : (508) 977-6870
Ftp : ftp@boneserver.analogic.com
Email : rjohnson@analogic.com, johnson@analogic.com
Penguin : Linux version 2.1.29 on an i586 machine (66.15 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-