Re: [Xen-devel] [PATCH] Dump flush write performance

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 24/10/07 22:10, "Ben Guthro" <bguthro@xxxxxxxxxxxxxxx> wrote:

> Two changes to avoid disk driver using up kernel memory and triggering
> oom-killer
> while creating guest dump to a disk file:
> 
> 1) Decreased write chunks from 16MB to 2MB;
> 2) Flush (fsync) after each 2MB write.

I don't think we've had any reports of core dumping causing oom killer to
kick in. It seems a bit unlikely after all, unless you're really running
dom0 close to the wire. A user process write()ing a big file shouldn't be
able to trigger oom killer imo.

 -- Keir



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