El día Monday, July 25, 2016 a las 05:00:59PM -0700, Mark Millard escribió:

> Matthias Apitz guru at unixarea.de wrote on Mon Jul 25 16:10:52 UTC 2016 :
> > On Monday, 25 July 2016 17:11:23 CEST, Eric van Gyzen <vangyzen at 
> > FreeBSD.org> wrote: > 
> > > What file system are you using? 
> > UFS; I followed the good instructions about new SSD disk configuration; 
> > that's why I now have swap as plain file :-( 
> Unfortunately see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206048 :
> 11.0-CURRENT -r293227 (and others) arm (rpi2/BeagleBone Black) amd64 etc: 
> swapfile usage hangs; swap partition works .
> As far as I know it still applies for the problems that can occur for 
> plain-file based swap files. The list of comments covers more than just armv6 
> as having example failures.

Thanks for the pointer to the bug issue. I remembered, that I created
the swap file as a so called sparse file (dd ... bs=1m seek=8192 count=0) and
this is still visible with du(1):

# du -sh /usr/swap01 ; ls -lh /usr/swap01
 95M    /usr/swap01
-rw-------  1 root  wheel   8,0G 25 jul.  08:19 /usr/swap01

I have now unmounted the swap and re-created it with real blocks:

# swapoff -a
swapoff: removing /dev/md99 as swap device

# dd if=/dev/zero of=/usr/swap01 bs=1m count=8192
8192+0 records in
8192+0 records out
8589934592 bytes transferred in 43.594277 secs (197042712 bytes/sec)
# du -sh /usr/swap01 ; ls -lh /usr/swap01
8,0G    /usr/swap01
-rw-------  1 root  wheel   8,0G 26 jul.  07:24 /usr/swap01

I will first give this a try. If the crash rehappens, I will move it to
a real freebsd-swap partition.

While saying 'crash', I now remember that in the two cases which I named
'hard locked', the system was still alive in the sense of echoing typed
chars, it was only impossible to start new commands or login on another
console. This points too in the direction of a disk access or swap problem.



Matthias Apitz, ✉ g...@unixarea.de, ⌂ http://www.unixarea.de/  ☎ 
"Wer übersieht, dass wir uns den anderen weggenommen haben und sie uns 
wiederhaben wollen,
kann von den Kämpfen der letzten Tage keinen verstehen. Und kann natürlich auch 
dieser Kämpfe bestehen." Hermann Kant in jW 1.10.1989
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