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virresctrl: Fix updating the mask for a cache resource

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In 'virResctrlAllocUpdateMask', mask is updated only if 'previous mask' is NULL.

By default, the bitmask for a cache resource for a VM is initialized with
'default-resctrl-group' bitmask. So the 'previous mask' would not be NULL and
mask won't get updated if cachetune is configured for a VM. This causes libvirt
to use same bitmask as 'default-resctrl-group' bitmask for a cache resource for
a VM. This patch fixes the issue.

Fixes: d8a354954a

Signed-off-by: Vinayak Kale <vkale@nvidia.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Vinayak Kale 2021-07-02 12:53:15 +05:30 committed by Ján Tomko
parent 6bda1eb157
commit a9c7da6126
1 changed files with 4 additions and 2 deletions
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4
src/util/virresctrl.c
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@ -1104,7 +1104,9 @@ virResctrlAllocUpdateMask(virResctrlAlloc *alloc,
VIR_EXPAND_N(a_type->masks, a_type->nmasks,
cache - a_type->nmasks + 1);
if (!a_type->masks[cache])
if (a_type->masks[cache])
virBitmapFree(a_type->masks[cache]);
a_type->masks[cache] = virBitmapNewCopy(mask);
return 0;