| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
[Xen-devel] Re: Reducing impact of save/restore/dump on Dom0
"Graham, Simon" <Simon.Graham@xxxxxxxxxxx> writes:
> Currently, save, restore and dump all used cached I/O in Dom0 to
> write/read the file containing the memory image of the DomU - when the
> memory assigned to the DomU is greater than free memory in Dom0, this
> leads to severe memory thrashing and generally the Dom0 performance goes
> into the toilet.
>
> The 'classic' answer to avoiding this when writing very large files is,
> of course, to use non-cached I/O to manipulate the files -
Otherwise you can just use madvise()/fadvise() to tell the kernel
to drop the old data [the later might need a fairly recent kernel
to work]
It has the advantage that it doesn't need much other changes.
-Andi
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home