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From: grog@lemis.de (Greg Lehey)
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	id MAA08351 for FreeBSD-current@FreeBSD.ORG; Wed, 5 Jun 1996 12:56:00 +0200
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Subject: Still more on VM and swap
To: FreeBSD-current@FreeBSD.ORG (FreeBSD current users)
Date: Wed, 5 Jun 1996 12:56:00 +0200 (MET DST)
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I've just rebuilt a kernel with CTM 2075.  Bad news: emacs still craps
out.  Still, I have followed up on the "swap loss" problem and tried
starting emacs again and again.  Here are the results.  This is the
first thing I did after booting:

# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768      560    32144     2%    Interleaved
# emacs
Invalid function: []
# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     2864    29840     9%    Interleaved
# emacs
Invalid function: [156 -66730240 16782444 Fatal error (11).Segmentation fault (core dumped)
# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     4364    28340    13%    Interleaved
# emacs
# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     5144    27560    16%    Interleaved
# emacs
# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     5580    27124    17%    Interleaved
# emacs
# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     5580    27124    17%    Interleaved
# emacs
# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     5580    27124    17%    Interleaved
# emacs
# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     6016    26688    18%    Interleaved
# emacs; pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     6016    26688    18%    Interleaved
# emacs; pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     6016    26688    18%    Interleaved
# 

Looks like emacs is getting left behind in the swap, doesn't it?
Let's take a look:

# ls -l /usr/local/bin/emacs
-rwxr-xr-t  2 root  bin  2168305 Apr 28 18:28 /usr/local/bin/emacs

So it's sticky, so I suppose it should get left behind in the swap.
But shouldn't swap be cleaned out of sticky if it fills up?  In any
case, I rebooted and did:

# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768      616    32088     2%    Interleaved
# ls -l /usr/local/bin/emacs
-rwxr-xr-t  2 root  bin  2168305 Apr 28 18:28 /usr/local/bin/emacs
# chmod 755 /usr/local/bin/emacs
# ls -l /usr/local/bin/emacs
-rwxr-xr-x  2 root  bin  2168305 Apr 28 18:28 /usr/local/bin/emacs
# pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     1256    31448     4%    Interleaved
# emacs; pstat -s
Invalid function: [#[(ü\\\\\\\\\ô\\´z\P\\\\\\\\\\\
                                                  \\üÁ\P\,\\\\\\4\\$\\Á\PD\\\\\\L\\<\\À\P\\\\\\\\d\\T\\\,\Pt\\\\\\|\\l\\Dí\P\\\\\\\\\\Dö\P¤\\\\\\¬\\\\\\t\P¼\\\\\\Ä\\´\\\\\\\PÔ\\\\\\Ü\\\\\\ì*\Pì\\\\\\                                                   \\\\\\\current-time\\\\\\\\\\\\format-time-string\\\
                                                                                                        \\\\\\\decode-ti^C
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     3224    29480    10%    Interleaved
# emacs; pstat -s
Invalid function: [941424 unbound #[nil "`Àeb~Ãy`
bÃy     ÄU,ÅÆÇÄ`\"TÇ    `\"T#4ÅÈÇÄ`\"T\"," [nil start opoint 0 1
message "
h¬ç\\j\M\\\ÿp@WÿuìhãÓ\\hãÓ\\è \\EøM\\\MøHHÄ$M\\\xH\t\@H\·P\"\·@$\\ë\1ÛM¹\\\\t\(fÇEþ\\j\EþPhëÓ\\\\\ÿp@è³\
\\·Eþ\ÃÄ\M\\^C
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     4096    28608    13%    Interleaved
# emacs; pstat -s
Wrong type argument: wholenump, Fatal error (11).Segmentation fault (core dumped)
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     5476    27228    17%    Interleaved
# emacs; pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     5828    26876    18%    Interleaved
# emacs; pstat -s
Device      1024-blocks     Used    Avail Capacity  Type
/dev/wd0s1b       32768     5828    26876    18%    Interleaved
# 

So probably this isn't the problem after all.  Note particularly that
after the ls and chmod commands there were 640 kB less swap available
than before.

Greg