Re: [Xen-devel] [PATCH][TOOLS] Reducing impact of domainsave/restore/dump on Dom0

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 13/2/07 22:12, "Graham, Simon" <Simon.Graham@xxxxxxxxxxx> wrote:

> Reduce impact of saving/restoring/dumping large domains on Dom0 memory
> usage by means of fadvise64() to tell the OS to discard the cache pages
> used for the save/dump file.
> 
> Signed-off-by: Simon Graham <Simon.Graham@xxxxxxxxxxx>

Could the fadvise() logic be shared more than it is in this patch? Also you
sometimes sync-then-fadvise. Is this just a performance enhancement
(presumably fadvise wouldn't simply discard dirty pages in the buffer
cache)?

 -- Keir


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