Re: Question about OOM-Killer

Marcelo Tosatti
2005-07-23T13:00:48Z

James,

Can you send the OOM killer output?

I dont know which devices part of an x86-64 system should
be limited to 16Mb of physical addressing. Andi?

I don't think that any devices should have 16MB limitation

On Mon, Jul 18, 2005 at 12:36:50PM -0700, James Washer wrote:
> Sorry, I should have added...
> 2.6.11.10,
> x86-64 dual proc (Intel Xeon 3.4GHz)
> 6GiB ram
> Intel Corporation 82801EB (ICH5) SATA Controller (rev 0)
> Host: scsi0 Channel: 00 Id: 00 Lun: 00
> Vendor: ATA Model: Maxtor 6Y160M0 Rev: YAR5
> Type: Direct-Access ANSI SCSI revision: 05
> Host: scsi0 Channel: 00 Id: 01 Lun: 00
> Vendor: ATA Model: Maxtor 7Y250M0 Rev: YAR5
> Type: Direct-Access ANSI SCSI revision: 05
>
>
> On Mon, 18 Jul 2005 12:21:01 -0700
> James Washer <washer@trlp.com> wrote:
>
> > I'm chasing down a system problem where the DMA memory (x86-64, god knows why it is using DMA memory)
> drops below the minimum, and the OOM-Killer is fired off.
> >
> > It just strikes me odd that the OOM-Killer would be called at all for DMA memory.
> What's the chance of regaining DMA memory by killing user land processes?
> >
> > I'll admit, I know very little about linux VM, so perhaps I'm missing how oom killing can be helpful here.