kern/103455: "swap_pager: indefinite wait buffer" with page file enabled (causes lockups)

[Kris Kennaway]

Punkey Funky wrote:
> The following reply was made to PR kern/103455; it has been noted by GNATS.
> 
> From: Punkey Funky <lee at punkey.net>
> To: bug-followup at FreeBSD.org, nick at nickwithers.com
> Cc:  
> Subject: Re: kern/103455: "swap_pager: indefinite wait buffer" with page file
>  enabled (causes lockups)
> Date: Thu, 15 Nov 2007 10:36:29 +0000
> 
>  "Me too"...
>  
>  Running 7.0-CURRENT, although I've seen this issue since 6.x.
>  
>  I note that many online resources claim that this error arises with either 
>  disks about to fail and/or bad cables/controller.
>  
>  In order to rule this out, I purchased brand new hardware:
>  
>  atapci2: <HighPoint HPT374 (channel 0+1) UDMA133 controller> port 
>  0xdb00-0xdb07,0xdc00-0xdc03,0xdd00-0xdd07,0xde00-0xde03,0xdf00-0xdfff irq 
>  17 at device 11.0 on pci0
>  atapci3: <HighPoint HPT374 (channel 2+3) UDMA133 controller> port 
>  0xe000-0xe007,0xe100-0xe103,0xe200-0xe207,0xe300-0xe303,0xe400-0xe4ff irq 
>  17 at device 11.1 on pci0
>  [..]
>  ad8: 238475MB <Seagate ST3250620AS 3.AAE> at ata4-master UDMA133
>  ad10: 238475MB <Seagate ST3250620AS 3.AAE> at ata5-master UDMA133
>  ad12: 238475MB <Seagate ST3250620AS 3.AAE> at ata6-master UDMA133
>  [..]
>  ar0: 476950MB <HighPoint v3 RocketRAID RAID5 (stripe 64 KB)> status: READY
>  ar0: disk0 READY using ad8 at ata4-master
>  ar0: disk1 READY using ad10 at ata5-master
>  
>  ... and despite the new hardware, the issue still occurs.
>  
>  I have checked the drives with smartmontools and see no issues reported.
>  
>  This leads me to believe that it's not (in this case) related to failing 
>  hardware.
>  
>  This particular machine is a home system that performs filesharing, 
>  firewall, DNS and mail server duties.  It's by no means heavily loaded.
>  
>  When the issue does occur, the server is unresponsive on the console, and 
>  no other access (ssh, www, etc) is possible.  The server does respond to a 
>  ping.
>  
>  -L
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> 

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