On Thu, 21 Jan 1999, you wrote:
>btw, what PAGE_OFFSET setting do you use? (the default?)
>
As a followup, I downloaded the 2.2.0-pre9 kernel, ran the same tests as
before and had the same results, including the panics. The panics were
again in the same function:
701ccd98 t BusLogic_ScanIncomingMailboxes
Any ideas or things that I should try?
Tom
>On Wed, 20 Jan 1999, Thomas Schenk wrote:
>
>> We have been testing a 2.2.0 kernel on a system with 2 Gigs of RAM and are
>> seeing some serious problems. The system in question is a Dell PowerEdge
>> 6300/400. This is a quad Xeon 400Mhz system with 2Gigs of RAM, two
>> AIC 7890 SCSI controllers, one AIC 7860 SCSI controller and 4 9 Gig disks.
>> We have eliminated the SCSI controllers as the source of our problem by
>> deactivating them and using a BusLogic BT958 controller instead. Here is
>> the problem. When we do something that causes huge amounts of RAM to be
>> used as buffers (750 Meg or more), the filesystems get corrupted badly and
>> network cards stop working (the NIC is a DEC 500-BA). We have also ruled
>> out the network driver as the source of the trouble since the problem
>> occurs using either the de4x5 driver or the tulip driver. We can
>> reproduce this problem reliably by doing the following:
>>
>> 1. Create a large file (750 Megabytes in our tests).
>> 2. ftp or rcp it to the big RAM machine. While this is going on, we can
>> see buffer usage increase using free.
>> 3. repeat step 2 until some buffer usage approaches the amount of RAM
>> installed.
>>
>> At this point, we start getting filesystem corruption and depending on the
>> ethernet driver, either repeated errors on the console or no response. We
>> are really eager to get a quad Xeon system in place with this much memory,
>> but it we are going to trash the filesystem every time we approach memory
>> exhaustion (which will probably occur more often than we like), we cannot
>> proceed.
>>
>> Any help would be greatly appreciated.
>>
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