Re: system keeps freezing once every 24 hours / random apps crashing

[Mark v Wolher <trilight@ns666.com>]

Mark v Wolher wrote:
> Mark v Wolher wrote:
> 
>>Jiri Slaby wrote:
>>
>>
>>>>Hi Sami,
>>>>
>>>>That caused also a crash, i kept pressing the v key and within 15
>>>>seconds it crashed, then i saw the crash-info appear in the log and when
>>>>i clicked on mozilla then it crashed too but without crahs info and
>>>>system froze totally.
>>>>
>>>>Below the crash info:
>>>>
>>>>Dec 31 17:38:32 localhost kernel: Unable to handle kernel paging request
>>>>at virtual address c8111000
>>>>Dec 31 17:38:32 localhost kernel:  printing eip:
>>>>Dec 31 17:38:32 localhost kernel: c036037a
>>>>Dec 31 17:38:32 localhost kernel: *pgd = 21063
>>>>Dec 31 17:38:32 localhost kernel: *pmd = 21063
>>>>Dec 31 17:38:32 localhost kernel: *pte = 8111000
>>>>Dec 31 17:38:32 localhost kernel: Oops: 0002 [#4]
>>>
>>>[snip]
>>>Could you try the attached patch?
>>>
>>>--
>>>diff --git a/drivers/media/video/bttv-risc.c b/drivers/media/video/bttv-risc.c
>>>--- a/drivers/media/video/bttv-risc.c
>>>+++ b/drivers/media/video/bttv-risc.c
>>>@@ -53,7 +53,7 @@ bttv_risc_packed(struct bttv *btv, struc
>>>	/* estimate risc mem: worst case is one write per page border +
>>>	   one write per scan line + sync + jump (all 2 dwords) */
>>>	instructions  = (bpl * lines) / PAGE_SIZE + lines;
>>>-	instructions += 2;
>>>+	instructions += 4;
>>>	if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions*8)) < 0)
>>>		return rc;
>>>
>>>
>>>
>>
>>
>>
>>Hi Jiri,
>>
>>Tried it but it seems to crash indeed faster, and this time it didn't
>>leave traces in the log.
>>
>>Appreciate your help eitherway !
>>-
> 
> 
> 
> Hiya all,
> 
> First of all happy new year ! :-)
> 
> 
> I might have discovered something interesting which might be responsible
> for all those lockups/freezes/crashes !
> 
> Right now, i'm putting a huge load on the system, disk i/o, swapping
> high, virusscan, number crushing with ssh-keygen moduli etc ...
> 
> 5 hours passed with this load and no single crash/freeze/lockup happened
> ! Normally with all this load sooner or later something would have
> happened.
> 
> What did i do ?
> 
> I disabled bttv support in the kernel, so no tv for me at this moment.
> I'm planning to let this run for at least another 5 hours with heavy
> load and see if still nothing happens...
> 
> Keeping you informed.
> 
> Mark
> 
> 
> 
> 

Still no crashes or irregular things happened ! Will let it go for a few
more hours. This test is being done with the binary nvidia module loaded
and bttv disabled. The next test will be nv for X instead of the binary
module with bttv enabled, if crashes and such start to occur then it's
very likely that the problem sits in the bttv code.