Re: kern/45709: tmpfs size went nuts

[Taylor R Campbell <campbell+netbsd%mumble.net@localhost>]

   Date: Sat, 17 Dec 2011 03:00:06 +0000 (UTC)
   From: David Holland <dholland-bugs%netbsd.org@localhost>

   On Fri, Dec 16, 2011 at 11:00:10PM +0000, Taylor R Campbell wrote:
    >  Unlikely.  I had two or three gigabytes of swap handy, and there was
    >  only about a gigabyte of RAM in use at the time, plus a few dozens of
    >  megabytes stored in the tmpfses.  So there should have been four or
    >  five gigabytes of memory free, not ten to twenty megabytes.

   So, something was truncating to 32 bits? :-/

Hmm, sounds plausible, particularly since I'm on i386.  The
combination of size_t and uint64_t in tmpfs_bytes_max in tmpfs_subr.c
looks suspect, but it wouldn't surprise me if there were other
problems with this elsewhere in the system.