32GB/device swap limit on amd64

[Peter Wemm]

On Sunday 01 May 2005 03:06 pm, Kris Kennaway wrote:
> Looks like amd64 has the following limit, which is the same as on
> i386:
>
> WARNING: reducing size to maximum of 67108864 blocks per swap unit
>
> Can this be easily fixed on amd64?
>
> Kris

This looks like its a subr_blist.c problem:

        /*
         * If we go beyond this, we get overflows in the radix
         * tree bitmap code.
         */
        mblocks = 0x40000000 / BLIST_META_RADIX;
        if (nblks > mblocks) {
                printf("WARNING: reducing size to maximum of %lu blocks per swap unit\n",
                        mblocks);
                nblks = mblocks;
        }

sys/blist.h:#define BLIST_META_RADIX 16
--
Peter Wemm - peter at wemm.org; peter at FreeBSD.org; peter at yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5