[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] xen: actually release memory when shrinking domain
From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> Fix this: It appears that in the upstream balloon driver, > the call to HYPERVISOR_update_va_mapping is missing > from decrease_reservation. I think as a result, > the balloon driver is eating memory but not > releasing it to Xen, thus rendering the balloon > driver essentially useless. (Can be observed via xentop.) Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx> --- drivers/xen/balloon.c | 5 +++++ 1 file changed, 5 insertions(+) =================================================================== --- linux-2.6.28/drivers/xen/balloon.c.orig +++ linux-2.6.28/drivers/xen/balloon.c @@ -296,6 +296,11 @@ frame_list[i] = pfn_to_mfn(pfn); scrub_page(page); + + ret = HYPERVISOR_update_va_mapping( + (unsigned long)__va(pfn << PAGE_SHIFT), + __pte_ma(0), 0); + BUG_ON(ret); } /* Ensure that ballooned highmem pages don't have kmaps. */ _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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