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On Tue, Feb 26, 2008 at 09:40:00PM +0000, cbrand@xxxxxxxxxxx wrote:
> The shared memory code stores the total number of bytes available
> for use as shared memory in shminfo.shmmax. This is a uint32_t, so
> it overflows at 4GB (note that it's initially set to the max number
> of pages, but this is the multiplied by PAGE_SIZE).
>
> Index: sys/kern/sysv_shm.c
> ===================================================================
> RCS file: /cvsroot/pkt/sw/netbsd300/usr/src/sys/kern/Attic/sysv_shm.c,v
^^^^^
> [...]
All that stuff got ripped out in -current and replaced with new code
that doesn't have such silly limits.
FWIW.
I don't know what the prospects are for getting the new code in 3.x;
but maybe the simple fix will do.
> < int32_t shmmax; /* max shared memory segment size (bytes) */
> ---
> > int64_t shmmax; /* max shared memory segment size (bytes) */
..it should be size_t (or ssize_t if it really needs to be signed for
some reason), not either int32_t or int64_t.
(Also, in general, when sending diffs please use diff -u or diff -up.)
--
David A. Holland
dholland@xxxxxxxxxx
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