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From 893e9283b1ff2334309ab96e6bdf1ac2d325ad22 Mon Sep 17 00:00:00 2001
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Message-Id: <893e9283b1ff2334309ab96e6bdf1ac2d325ad22@dist-git>
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From: Martin Kletzander <mkletzan@redhat.com>
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Date: Mon, 15 Apr 2019 17:33:03 +0200
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Subject: [PATCH] resctrl: Set MBA defaults properly
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Similarly to CAT, when you set some values in an group, remove the group and
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recreate it, the previous values will be kept there. In order to not get values
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from a previous setting (a previous VM, for example), we need to set them to
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sensible defaults. The same way we do that for CAT, just set the same values as
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the default group has.
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Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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(cherry picked from commit ceb6725d945490a7153cf8b10ad3cd972d3f1c16)
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1468650
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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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Message-Id: <25defb79bad13f027d7125e70f2cc6b09f817474.1555342313.git.phrdina@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/util/virresctrl.c | 39 +++++++++++++++++++++++++++++++++++++++
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1 file changed, 39 insertions(+)
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diff --git a/src/util/virresctrl.c b/src/util/virresctrl.c
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index f5e4bef7dc..92953dadf9 100644
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--- a/src/util/virresctrl.c
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+++ b/src/util/virresctrl.c
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@@ -1829,6 +1829,42 @@ virResctrlAllocMemoryBandwidth(virResctrlInfoPtr resctrl,
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}
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+static int
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+virResctrlAllocCopyMemBW(virResctrlAllocPtr dst,
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+ virResctrlAllocPtr src)
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+{
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+ size_t i = 0;
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+ virResctrlAllocMemBWPtr dst_bw = NULL;
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+ virResctrlAllocMemBWPtr src_bw = src->mem_bw;
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+
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+ if (!src->mem_bw)
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+ return 0;
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+
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+ if (!dst->mem_bw &&
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+ VIR_ALLOC(dst->mem_bw) < 0)
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+ return -1;
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+
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+ dst_bw = dst->mem_bw;
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+
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+ if (src_bw->nbandwidths > dst_bw->nbandwidths &&
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+ VIR_EXPAND_N(dst_bw->bandwidths, dst_bw->nbandwidths,
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+ src_bw->nbandwidths - dst_bw->nbandwidths) < 0)
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+ return -1;
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+
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+ for (i = 0; i < src_bw->nbandwidths; i++) {
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+ if (dst_bw->bandwidths[i]) {
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+ *dst_bw->bandwidths[i] = 123;
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+ continue;
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+ }
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+ if (VIR_ALLOC(dst_bw->bandwidths[i]) < 0)
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+ return -1;
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+ *dst_bw->bandwidths[i] = *src_bw->bandwidths[i];
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+ }
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+
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+ return 0;
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+}
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+
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+
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static int
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virResctrlAllocCopyMasks(virResctrlAllocPtr dst,
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virResctrlAllocPtr src)
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@@ -1896,6 +1932,9 @@ virResctrlAllocAssign(virResctrlInfoPtr resctrl,
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if (virResctrlAllocCopyMasks(alloc, alloc_default) < 0)
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goto cleanup;
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+ if (virResctrlAllocCopyMemBW(alloc, alloc_default) < 0)
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+ goto cleanup;
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+
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for (level = 0; level < alloc->nlevels; level++) {
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virResctrlAllocPerLevelPtr a_level = alloc->levels[level];
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virResctrlAllocPerLevelPtr f_level = NULL;
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--
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2.21.0
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