🚀 go-pugleaf

In <Jan05.220529.70886@yuma.ACNS.ColoState.EDU> jamison@yuma.ACNS.ColoState.EDU (Jamie Gulden) writes:


| This probably isn't a bug but...
| 
| Does IRIX (4.0.4) normally panic fault if it runs out of swap
| space?  I've got a short 5-7 line program that I try to find
| out how much memory I can allocate and it keeps panic faulting.
| 
| The syslog has a bunch of these:
| 
| Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3C514 (page still in memory)
| Jan  5 13:52:35 nagel unix: 
| Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3C834 (page still in memory)
| Jan  5 13:52:35 nagel unix: 
| Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3CA9C (page still in memory)
| Jan  5 13:56:53 nagel syslogd: restart
| 
| 
| And then the system comes up with this:
| 
| Jan  5 13:57:04 nagel syslogd: restart
| Jan  5 13:57:05 nagel savecore: reboot after panic: 
| Jan  5 13:57:05 nagel PANIC: swapoutpts - i/o error in swap
| 
| 
| So, is there a disk I/O problem, did we tell it to use more blocks
| than there actually are, or something else I'm missing.

It isn't an out of swap problem at all.  There is a disk error
of some kind, *or* you have somehow configured the system to believe
that there is more swap space than will fit on that partition.

There are a couple of places in the swapping code where the system
is fully committed, and can't recover on an error; in most cases it
will just kill the process that it was trying to swap (or retry it
later).
--
Let no one tell me that silence gives consent,  |   Dave Olson
because whoever is silent dissents.             |   Silicon Graphics, Inc.
    Maria Isabel Barreno                        |   olson@sgi.com

In article <uh43lv0@zuni.esd.sgi.com> olson@anchor.esd.sgi.com (Dave Olson) writes:
>
>It isn't an out of swap problem at all.  There is a disk error
>of some kind, *or* you have somehow configured the system to believe
>that there is more swap space than will fit on that partition.
>
Sorry this is a FAQ, but I cann't find it from my saved old news files.

How do you check the swap space and change it ?
Also, is there a way to make sure weather it's a disk error or just swap.
Thanks,

In <63172@mimsy.umd.edu> dong@umiacs.umd.edu (Dong Chen) writes:

| In article <uh43lv0@zuni.esd.sgi.com> olson@anchor.esd.sgi.com (Dave Olson) writes:
| >
| >It isn't an out of swap problem at all.  There is a disk error
| >of some kind, *or* you have somehow configured the system to believe
| >that there is more swap space than will fit on that partition.
| >
| 
| How do you check the swap space and change it ?
| Also, is there a way to make sure weather it's a disk error or just swap.

/etc/swap -l will tell you.  If there is only one swap area, it is
the configured swap area from the kernel, and that shouldn't be an
issue.  If it is a secondary swap area (as seems likely, since it was
on disk 3), then some rc script in /etc/rc2.d most likely has been
added locally that has swap -a commands in it.  Check the values
against prtvtoc -s dks0d3vh (or whichever disk is appropriate).
--
Let no one tell me that silence gives consent,  |   Dave Olson
because whoever is silent dissents.             |   Silicon Graphics, Inc.
    Maria Isabel Barreno                        |   olson@sgi.com

In article <uh43lv0@zuni.esd.sgi.com>, olson@anchor.esd.sgi.com (Dave Olson) writes:
|> In <Jan05.220529.70886@yuma.ACNS.ColoState.EDU> jamison@yuma.ACNS.ColoState.EDU (Jamie Gulden) writes:
|> 
|> 
|> | This probably isn't a bug but...
|> | 
|> | Does IRIX (4.0.4) normally panic fault if it runs out of swap
|> | space?  I've got a short 5-7 line program that I try to find
|> | out how much memory I can allocate and it keeps panic faulting.
|> | 
|> | The syslog has a bunch of these:
|> | 
|> | Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3C514 (page still in memory)
|> | Jan  5 13:52:35 nagel unix: 
|> | Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3C834 (page still in memory)
|> | Jan  5 13:52:35 nagel unix: 
|> | Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3CA9C (page still in memory)
|> | Jan  5 13:56:53 nagel syslogd: restart
|> | 
|> | 
|> | And then the system comes up with this:
|> | 
|> | Jan  5 13:57:04 nagel syslogd: restart
|> | Jan  5 13:57:05 nagel savecore: reboot after panic: 
|> | Jan  5 13:57:05 nagel PANIC: swapoutpts - i/o error in swap
|> | 
|> | 
|> | So, is there a disk I/O problem, did we tell it to use more blocks
|> | than there actually are, or something else I'm missing.
|> 
|> It isn't an out of swap problem at all.  There is a disk error
|> of some kind, *or* you have somehow configured the system to believe
|> that there is more swap space than will fit on that partition.
|> 
|> There are a couple of places in the swapping code where the system
|> is fully committed, and can't recover on an error; in most cases it
|> will just kill the process that it was trying to swap (or retry it
|> later).
|> --

I also had a customer that had added more swap using the " swap -a " command and
had set the swap boundary's slightly overlapping on another partition causing 
the very same symptoms.

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