cvs commit: src/sys/sys mdioctl.h src/sys/dev/md md.c src/sbin/mdconfig Makefile mdconfig.8 mdconfig.c

Poul-Henning Kamp phk at
Fri Sep 17 10:07:38 PDT 2004

In message <20040917170302.GT30151 at>, Pawel Jakub Dawidek w
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>On Fri, Sep 17, 2004 at 10:29:47AM -0600, Scott Long wrote:
>+> >Uhm, be aware that we are limited also to the size of individual
>+> >swap disks.  31 bits of bytes/sectors/pages, not quite sure which.
>+> >
>+> 32 bits of pages, unless there is somewhere in the chain that the=20
>+> unsigned nature of the word is not being honored.
>Pages. It gives as maximum swap-backed device of 16TB. I tested it with
>~15TB devices, so there is no signed/unsigned problem (which will limit
>us to 8TB). Of course you can always (I hope) increase page size:)

I belive there is a limit both for the total swapspce (16TB sounds likely)
but also a limit for each swapdevice as far as I know.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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