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

On Mon, Feb 12, 2007 at 04:48:09PM -0500, Graham, Simon wrote:
> Attached is a patch to unstable that stops save/restore/dump from hosing
> Dom0 when dealing with large domains - I'm actually resubmitting the
> dump patch I previously submitted in addition as it hasn't been
> incorporated yet; this is based on using fadvise64(DONTNEED) to throw
> the page cache away once it has been written to disk -- with this in
> place, memory usage does go up somewhat but then immediately drops again
> when the action is done and this change, in conjunction with setting the
> vm.dirty_ratio sysctl parameter seems to gives very good results.

Question - why fadvise64 and not posix_fadvise? posix_fadvise complies
to some posix standard, according to the man page, whereas the fadvise64
seems to be some glibc internal definition.

Just a thought.


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