From 47e13da0a1b0c6e22f95eb79585cb1ab1dddec75 Mon Sep 17 00:00:00 2001 From: Miroslav Rezanina Date: Fri, 3 Sep 2010 18:22:31 +0100 Subject: [PATCH] xend: reserve vtd_mem on guest restore There's need for free vtd_mem more memory for guest with xen-unstable c/s 17529. This memory is freed when guest is created, but is not freed when guest is restored. So restore guest fails due to not enough of memory for guest. Following patch uses same calculation of memory to free in guest restore as is in guest creation. Signed-off-by: Miroslav Rezanina Signed-off-by: Ian Jackson --- tools/python/xen/xend/XendCheckpoint.py | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/tools/python/xen/xend/XendCheckpoint.py b/tools/python/xen/xend/XendCheckpoint.py index 10ed67f807..4c68fb38af 100644 --- a/tools/python/xen/xend/XendCheckpoint.py +++ b/tools/python/xen/xend/XendCheckpoint.py @@ -277,7 +277,15 @@ def restore(xd, fd, dominfo = None, paused = False, relocating = False): # set memory limit xc.domain_setmaxmem(dominfo.getDomid(), maxmem) - balloon.free(memory + shadow, dominfo) + vtd_mem = 0 + info = xc.physinfo() + if 'hvm_directio' in info['virt_caps']: + # Reserve 1 page per MiB of RAM for separate VT-d page table. + vtd_mem = 4 * (dominfo.info['memory_static_max'] / 1024 / 1024) + # Round vtd_mem up to a multiple of a MiB. + vtd_mem = ((vtd_mem + 1023) / 1024) * 1024 + + balloon.free(memory + shadow + vtd_mem, dominfo) shadow_cur = xc.shadow_mem_control(dominfo.getDomid(), shadow / 1024) dominfo.info['shadow_memory'] = shadow_cur -- 2.30.2