Mailinglist Archive: opensuse (3539 mails)

["Carlos E. R." <robin.listas@xxxxxxxxxxxxxx>]

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The Monday 2008-06-16 at 20:52 -0400, Matt Archer wrote:

> Sounds like it's related to graphics-related data, possibly swapped
> out to disk -- say the contents of a frame-buffer was swapped out
> of the graphics card into main memory..and from there, swapped out
> to disk swap space.
>
> POSSIBLY what is initiating this is the graphics card trying to
> access the swapped-out data in main memory, not finding it, and
> initiating main-memory page swaps ... but unfortunately, the kernel

...

> eventually, after 30-45 seconds, all of the memory shuffling
> and memory page-swapping is finally done, and your system
> freeze ends.

I don't think that is the case, because it doesn't explain this:

> >  Jun 16 21:18:51 copernicus kernel: ata1.01: qc timeout (cmd 0xa0)
> >  Jun 16 21:18:51 copernicus kernel: ata1.01: exception Emask 0x0 SAct 0x0  SErr 
> > 0x0 action 0x2 frozen
> >  Jun 16 21:18:51 copernicus kernel: ata1.01: cmd  
> > a0/00:00:00:00:20/00:00:00:00:00/b0 tag 0 cdb 0x0 data 0
> >  Jun 16 21:18:51 copernicus kernel:          res  
> > 51/20:03:00:00:00/00:00:00:00:00/b0 Emask 0x5 (timeout)
> >  Jun 16 21:18:56 copernicus kernel: ata1: port is slow to respond, please  be 
> > patient (Status 0xd1)
> >  Jun 16 21:19:01 copernicus kernel: ata1: device not ready (errno=-16),  
> > forcing hardreset

The disk port is not responding, so the kernel decides to resets it. 
During that time, nothing can be read from the disk, and all processes 
needing i/o are stopped, frozen.

> >  Jun 16 21:19:01 copernicus kernel: ata1: soft resetting link
> >  Jun 16 21:19:01 copernicus kernel: ata1.00: configured for UDMA/100
> >  Jun 16 21:19:02 copernicus kernel: ata1.01: configured for UDMA/33
> >  Jun 16 21:19:02 copernicus kernel: ata1: EH pending after completion, 
> > repeating EH (cnt=4)
> >  Jun 16 21:19:02 copernicus kernel: ata1: EH complete
> >  Jun 16 21:19:02 copernicus kernel: sd 0:0:0:0: [sda] 156301488 512-byte 
> > hardware sectors (80026 MB)
> >  Jun 16 21:19:02 copernicus kernel: sd 0:0:0:0: [sda] Write Protect is off
> >  Jun 16 21:19:02 copernicus kernel: sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> >  Jun 16 21:19:02 copernicus kernel: sd 0:0:0:0: [sda] Write cache: enabled, 
> > read cache: enabled, doesn't support DPO or FUA
> >  Jun 16 21:19:02 copernicus kernel: sd 0:0:0:0: [sda] 156301488 512-byte 
> > hardware sectors (80026 MB)
> >  Jun 16 21:19:02 copernicus kernel: sd 0:0:0:0: [sda] Write Protect is off
> >  Jun 16 21:19:02 copernicus kernel: sd 0:0:0:0: [sda] Mode Sense: 00 3a 00  00
> >  Jun 16 21:19:02 copernicus kernel: sd 0:0:0:0: [sda] Write cache: enabled, 
> > read cache: enabled, doesn't support DPO or FUA

11 seconds exactly.

- -- 
Cheers,
       Carlos E. R.
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