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

["Graham, Simon" <Simon.Graham@xxxxxxxxxxx>]

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.

Simon

-----------------------------------
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>

Attachment: xen-dom0-cache.patch
Description: xen-dom0-cache.patch

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