[Xen-changelog] [xen stable-4.12] x86/shim: fix ballooning down the guest

[patchbot@xxxxxxx]

commit 0d210c05358be70fc3b9e83305f6720dc56cff85
Author:     Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>
AuthorDate: Fri Oct 25 11:39:46 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Oct 25 11:39:46 2019 +0200

    x86/shim: fix ballooning down the guest
    
    Currently ballooning down a pvshim guest causes the following errors
    inside the shim:
    
        d3v0 failed to reserve 512 extents of order 512 for offlining
    
    And the ballooned-out pages stay inside shim and don't reach L0 Xen.
    
    Fix this by passing the correct arguments to pv_shim_offline_memory()
    during a XENMEM_decrease_reservation request.
    
    Fixes: b2245acc60c3 ('xen/pvshim: memory hotplug')
    Signed-off-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>
    Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: ddc5a85fbcfbacc34bbd9abcdb12923de2fc27b3
    master date: 2019-09-26 18:06:07 +0200
---
 xen/common/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/common/memory.c b/xen/common/memory.c
index 5387769987..74d6880ffd 100644
--- a/xen/common/memory.c
+++ b/xen/common/memory.c
@@ -1233,7 +1233,7 @@ long do_memory_op(unsigned long cmd, 
XEN_GUEST_HANDLE_PARAM(void) arg)
              * hypercall has failed and only part of the extents where
              * processed.
              */
-            pv_shim_offline_memory(args.nr_extents, args.nr_done);
+            pv_shim_offline_memory(args.nr_done, args.extent_order);
 #endif
 
         break;
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.12

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